Are you ever overwhelmed by your own emotions?
You’re skilled with your hands and good at problem-solving, yet somehow your relationships don’t go well.
You want to be free, but sometimes you’re struck by intense anxiety.
If you can relate to such experiences, you might be an ISTP-TD.
People of this type have an aspect like that of a delicate craftsperson.
While possessing excellent technical skills, they fight emotional storms within.
In this article, let’s explore the complex and fascinating world of the ISTP-TD.
Your “easily misunderstood traits” might actually be hidden strengths.
Once again, personality researcher and author of Villain Encyclopedia, Tokiwa (@etokiwa999), will provide the explanation.
※We have developed the HEXACO-JP Personality Assessment! It has more scientific basis than MBTI. Tap below for details.
目次
- 1 Overview of HEXACO
- 2 Characteristics of ISTP-TD
- 3 Strengths and Weaknesses of ISTP-TD
- 4 ISTP-TD Romantic Relationship Tendencies and Improvement Strategies
- 5 ISTP-TD Friendship Tendencies and Improvement Strategies
- 6 ISTP-TD Parenting Tendencies and Improvement Strategies
- 7 ISTP-TD Career Tendencies and Improvement Strategies
- 8 ISTP-TD Work Tendencies and Improvement Strategies
- 9 Compatible Types for ISTP-TD
- 10 ISTP-TD Summary
- 11 FAQや注意点
- 12 補足
Overview of HEXACO
What is HEXACO?
“What kind of person am I really?” The HEXACO model is what answers this question.
This is a relatively new method that analyzes human personality through six elements.
The six letters H・E・X・A・C・O represent your individuality.
Specifically, there are the following elements:
- H: Honesty-Humility
- E: Emotionality
- X: eXtraversion
- A: Agreeableness
- C: Conscientiousness
- O: Openness
You’ve probably felt “Why am I different from others?” before.
HEXACO is like a mirror that clarifies those “differences.”
It’s more detailed than conventional models and captures your uniqueness.
64 Classifications by HEXACO
The high and low of each of the 6 elements classifies into 64 types. Specifically, they are as follows.
- H: Honesty-Humility
- High → Light (L: Light)
- Low → Dark (D: Dark)
- E: Emotionality
- High → Turbulent (T: Turbulence)
- Low → Assertive (A: Assertiveness)
- X: eXtraversion
- High → Extrovert (E: Extrovert)
- Low → Introvert (I: Introvert)
- A: Agreeableness
- High → Feeling (F: Feeling)
- Low → Thinking (T: Thinking)
- C: Conscientiousness
- High → (J: Judging)
- Low → (P: Prospecting)
- O: Openness
- High → Intuitive (N: iNtuitive)
- Low → Sensor (S: Sensor)
These are connected like 16personalities to express types. Now let’s introduce the various types!
What is ISTP-T (Virtuoso – Cautious Type)?
ISTP-T is a type with low extraversion (I), low openness (S), low agreeableness (T), low conscientiousness (P), and high neuroticism (T) in the Big Five. Characteristics:
- High problem-solving ability and adaptability
- Self-doubt and perfectionism
- Interest in practical skills
- Anxiety about social expectations
- Internal conflict and desire for growth
They excel at finding creative solutions to concrete problems, but also tend to question their own abilities and decisions.
They focus on the present moment and value practical experience, but also harbor anxiety about long-term outcomes. In interpersonal relationships, they value personal space but may also feel anxious about social interactions.
While they welcome change and new challenges, they also fear failure. This internal conflict becomes the driving force for continuous self-improvement.
Characteristics of ISTP-TD
Characteristic ①: “An Adventurer Facing Inner Storms”
Do you sometimes find yourself being swept away by your own emotions?
ISTP-TD individuals are like ship captains navigating stormy seas.
While they appear calm on the surface, intense emotions swirl deep within their hearts.
In the middle of a boring meeting, you might suddenly feel “I want to escape from here right now.”
This characteristic may manifest in the following ways:
- Suddenly wanting to change planned activities
- Acting immediately when thinking “I want this”
- Choosing thrilling paths over safe options
But in reality, this “instability” is the source of your creativity.
You can instantly find solutions that others can’t think of.
Because you’re free from the cage of fixed ideas, you can discover new possibilities.
Others might find it hard to understand, but that’s also part of your charm.
Characteristic ②: “Solitary Craftsmanship”
“Why can’t I become close to others as easily as other people do?” Have you ever felt this way?
You are like a solitary craftsman who values freedom above all else.
You fear being constrained and take time to build deep relationships.
Even when in a group, you’re often standing one step back.
This characteristic may manifest in the following ways:
- Feeling suffocated without alone time
- Finding it difficult to respond when someone says “Let’s have tea sometime”
- Postponing decisions by saying “Let me think about it more”
However, this doesn’t mean you’re cold.
Rather, you seek truly trustworthy relationships over superficial connections.
Once you open your heart to someone, you become surprisingly loyal and dependable.
High-quality, few friendships are what you truly value.
Characteristic ③: “The Danger Lurking Behind a Brilliant Problem Solver”
Don’t you feel compelled to fix broken machines when you see them?
ISTP-TD individuals can solve problems like magicians.
What others struggle with for hours, you understand intuitively.
But sometimes you notice your “means-justify-the-ends” self and feel a little scared.
This characteristic may manifest in the following ways:
- Being relied upon by others when technical troubles arise
- Tendency to think “If the results are good, the process doesn’t matter”
- Prioritizing efficiency over rules
This ability truly shines in emergencies.
While others panic, you can calmly find the optimal solution.
However, in daily life, this might cause friction with others.
You might wonder “Why is that person so obsessed with rules?”
But your flexibility is the power that can save many people.
Strengths and Weaknesses of ISTP-TD
Strengths of ISTP-TD
Can you somehow stay calmer than others in crisis situations?
That’s one of your greatest talents.
Like a skilled surgeon, your hands don’t shake even under pressure.
You have the strength to think “everything will work out” even when facing complex problems.
ISTP-TD strengths include the following:
- Craftsman-like intuition that allows you to understand how to use any tool just by touching it
- The courage to make accurate judgments even in panic situations
- Creativity to generate new solutions even when told “there’s no precedent”
Furthermore, your independence leads to true self-reliance.
You have the strength to walk your own path without being swayed by others’ evaluations.
Even when you’re about to be swept away by emotions, you can ultimately regain your composure.
This is a particularly valuable ability in our chaotic modern society.
You might be a modern survival expert.
Weaknesses of ISTP-TD
“I made the same mistake again” – do you ever blame yourself this way?
Your emotional waves sometimes cause suffering for yourself.
You might think “I’ll do my best today” in the morning, but feel completely different by evening.
This unpredictability might trouble you the most.
These characteristics can potentially cause the following problems:
- Speaking logically without considering the other person’s feelings
- Prioritizing current mood over long-term goals
- Having such dramatic mood changes that you confuse those around you
But these “weaknesses” are actually hidden strengths when turned around.
Because you’re emotionally rich, you can deeply savor life.
Because you’re too honest, you can become someone truly trusted.
Because you lack consistency, you can flexibly adapt to change.
The problem may not be the weaknesses themselves, but rather not being able to control them well.
ISTP-TD Romantic Relationship Tendencies and Improvement Strategies
ISTP-TD Romantic Tendencies
“I love you, but I don’t want to be tied down” – have you ever felt this kind of dilemma?
Your love is like the free wind.
Even when you deeply love someone, you need the reassurance that “I can be alone anytime.”
Even when you make date plans, there are days when your mood makes you want to postpone them.
These characteristics manifest as the following romantic tendencies:
- You feel pressured when told “contact me every day”
- You express feelings through handmade gifts rather than saying “I love you”
- When told “let’s get married in the future,” you somehow want to run away
But actually, people who can love as deeply as you are rare.
You choose to actually act for your partner rather than using superficial sweet words.
However, sometimes this way of expressing affection doesn’t get through to your partner.
Due to intense emotional ups and downs, you might be misunderstood as “cold today.”
Your love is like a quiet flame that continues to burn steadily.
When Problems Arise in Romance and Improvement Strategies
“Why did you suddenly become cold?” Have you ever been troubled when your partner said this to you?
Your emotional waves can sometimes make your lover anxious.
You were affectionate yesterday, but today you want to be alone.
This unpredictability might create cracks in the relationship.
As improvement strategies for these problems, the following can be suggested:
- Honestly say “I want some alone time today”
- Explain to your partner that you show love through actions rather than emotions
- Make a habit of checking your partner’s feelings by asking “How do you feel?”
What’s important is having your partner understand your style of expressing affection.
Tell them “I’m the type who shows love through actions rather than words.”
It’s also important to show empathy for your partner’s anxieties.
Sometimes you need to make a conscious effort to “listen more than usual.”
If you can bridge the gap with your partner while maintaining your authenticity, you can build a wonderful relationship.
ISTP-TD Friendship Tendencies and Improvement Strategies
Friendship Tendencies
“I wonder how many real friends I actually have?” Have you ever thought about this?
For you, friendship is about quality over quantity.
You’d rather cherish 3 true friends than have 100 acquaintances.
When someone says “let’s all have a farewell party,” you somehow feel reluctant.
These characteristics manifest as the following friendship tendencies:
- Even after knowing someone for six months, you still feel distance
- You can naturally have deep conversations with people who share your hobbies
- “Let’s work together next time” is more enjoyable than “let’s have tea next time”
But your friendship is as valuable as a diamond.
Once trust is established, you become companions who can support each other through any difficulty.
While you’re not good at superficial conversation, you always rush to help when someone is truly in trouble.
However, due to emotional ups and downs, you sometimes suddenly cut off contact.
Your friendship is a special bond of the few and the elite.
When Problems Arise in Friendships and Improvement Strategies
“You haven’t contacted me lately, did something happen?” Have you ever had a friend worry about you like this?
You’re not good at putting emotions into words, which can lead to misunderstandings.
Even when you’re not in a bad mood, people think you’ve “become cold.”
When your mood swings are intense, you might suddenly want to cancel plans with friends.
As improvement strategies for these problems, the following can be suggested:
- Explain by saying “I’m fine, I just needed some alone time”
- Make plans within reasonable limits, considering your physical condition and mood
- Sometimes express in words “I care about you”
The key to maintaining good friendships is having others understand your characteristics.
Tell them “I’m the type who shows friendship through actions rather than words.”
It’s also important to pay attention to others’ worries and anxieties.
Occasionally voice your gratitude by saying “thank you” or “that helped me.”
If your sincerity comes through, you’ll surely find friends who understand you.
ISTP-TD Parenting Tendencies and Improvement Strategies
Parenting Tendencies
“Do you want your children to grow up freely?” Have you ever wished for this?
Your parenting is like letting children play in a vast meadow.
Rather than giving detailed instructions saying “do this, don’t do that,” you want to cherish your child’s curiosity.
The time spent doing crafts and experiments together might feel the most enjoyable.
These characteristics appear as the following parenting tendencies:
- Let children experience whatever they say they “want to try”
- Emphasize hands-on learning over books and workbooks
- Fewer strict rules like “go to bed by X o’clock”
Your parenting is wonderful for fostering creativity and independence.
Your child’s problem-solving abilities when in trouble will surely be high.
However, emotional fluctuations can sometimes affect children too.
You might seem kind yesterday but appear aloof today.
It would be ideal if you could express your deep affection in a more understandable way.
When Parenting Becomes Problematic and Improvement Strategies
“Mom (Dad), are you in a bad mood today?” Have you ever been startled when your child asked you this?
Your emotional changes can sometimes become a source of anxiety for sensitive children.
The feeling of “wanting alone time” that adults can understand doesn’t easily communicate to children.
Also, being too rational sometimes causes you to overlook children’s emotions.
Improvement strategies for these problems include:
- When you feel emotional changes, say “I’m just a little tired, but I love you very much”
- First empathize with your child’s feelings of “that was fun” or “that was sad”
- Create a habit of asking “How was your day?” at the same time every day
What’s important in parenting is not becoming a perfect parent.
It’s important to show your unique way of expressing love in a way that’s understandable to children.
Sometimes it’s necessary to honestly say “Mom isn’t perfect either.”
It’s okay if you maintain the attitude of growing together with your child.
Your practical love will surely become a support for your child’s heart.
ISTP-TD Career Tendencies and Improvement Strategies
Career Tendencies
“Repeating the same things somehow feels suffocating.” Have you ever felt this way?
Your career is like a musician who plays various instruments.
Rather than deeply mastering one field, you want to acquire diverse skills.
You’ll find more appeal in work that involves actually moving your hands to solve problems rather than discussions in meeting rooms.
These characteristics appear as the following career tendencies:
- Suited for practical fields like engineering, craftsmanship, and technical work
- Show your true value in emergencies like fires and accidents
- Prefer “produce results in 3 months” work over “same project until next year”
Your greatest strength is being able to handle unexpected troubles.
When others are panicking, you can calmly find optimal solutions.
However, you might suddenly consider changing jobs when you lose interest.
Also, you tend to disregard organizational customs and political considerations.
Your career is valuable as it’s rich in changes and allows you to gain many experiences.
When Careers Become Problematic and Improvement Strategies
“Changing jobs again? How long will this one last?” Have you ever felt complicated emotions when family said this to you?
You focus so much on immediate challenges that you’re not good at long-term planning.
When you feel “my current job is somehow boring,” you want to quit impulsively.
Also, in workplace relationships, you might get irritated thinking “Why do such inefficient things?”
Improvement strategies for these problems include:
- Set goals like “I want to acquire these skills in 5 years”
- Before changing jobs, calmly analyze “why do I want to change jobs?”
- Ask about “reasons for inefficiency” and make an effort to understand the other person’s position
The key to stabilizing your career is finding an environment where you can leverage your strengths.
A workplace with frequent changes and practical skill demands is best.
Also, it’s important to regularly take time to reflect on your career.
Consulting with a trusted mentor will give you an objective perspective.
Your diverse experiences will surely become a great asset.
ISTP-TD Work Tendencies and Improvement Strategies
Work Tendencies
“The meeting is too long, I can’t concentrate anymore” – have you ever felt this way?
Your work style is as precise and efficient as a skilled surgeon.
You find value in actually solving problems rather than wasteful procedures or formal meetings.
Your strength lies in being able to take swift action with a “let’s try it first” mentality.
These characteristics manifest as the following work tendencies:
- Can identify the core of complex problems and provide solutions
- Constantly think about efficiency, asking “Why is this procedure necessary?”
- Better at working alone with focus rather than group work
You demonstrate your true potential in high-urgency projects.
Even when deadlines are approaching, you can calmly judge priorities.
However, concentration may vary due to mood fluctuations.
Also, when you see colleagues’ “inefficient” methods, you might want to intervene.
While your work is high quality, you tend to struggle with teamwork.
When Problems Arise at Work and Improvement Strategies
“I want you to value team harmony” – have you ever been confused when your boss said this?
Despite your high individual capabilities, you struggle with group cooperation.
When told to “consult with everyone,” it feels like a waste of time.
Also, due to emotional fluctuations, there are days when you “don’t want to talk to people.”
As improvement strategies for these problems, the following can be mentioned:
- Once a week, ask colleagues “How’s the current project going?”
- When feeling stressed, honestly say “I need a short break”
- Ask “Why do you use this method?” to understand others’ thinking
The key to success at work is demonstrating cooperation while leveraging your expertise.
It’s important to have a balance between focusing during alone time and cooperating during team time.
It’s also crucial to understand your emotional state and control it appropriately.
Make it a habit to regularly reflect on “what I learned from my current work.”
Your practical approach is a valuable asset to the workplace.
Compatible Types for ISTP-TD
Compatible Types: People with S
“I can communicate well with this person” – is there someone you feel this way about?
Those who are on your wavelength are fellow realistic S-type people.
You share an emphasis on practice over theory, concrete over abstract.
You’re less likely to think “Why would they do that?” when you’re together.
These types can understand and empathize with the following ISTP-TD characteristics:
- “Let’s try it first” action-oriented approach
- Learning from experience rather than textbooks
- The value of “wanting to be yourself”
Especially with ISTP or ESTP, you can develop a “silent understanding” relationship.
If you have common hobbies or interests, you can build deep trust.
Even if both struggle with emotional expression, you can show affection and friendship through actions.
However, be careful as neither is good at providing emotional support.
Your relationship with S-types can have practical and stable bonds.
Compatible Types: People with D
“This person understands my ambition” – is there someone you feel this way about?
Those who can build stimulating relationships with you are ambitious types who also have D.
They have a strong will to achieve goals and value efficiency.
Your “whatever it takes” attitude will also be understood by them.
These types can complement and balance the following ISTP-TD characteristics:
- “Results are everything” realism
- Attitude of eliminating waste and choosing the shortest route
- Confidence to not worry about others’ opinions
Extroverted D types like ESTD and ENTD bring out your sociability.
They provide you, who tend to be alone, with appropriate stimulation and growth opportunities.
Through cooperation that leverages each other’s strengths, you can achieve great results.
However, since both have strong self-assertion, opinions may sometimes clash.
Your relationship with D types is a bond like competitive rivals who elevate each other.
ISTP-TD Summary
After reading this far, did you feel any parts that made you think “this is really about me”? You as an ISTP-TD are like a ship captain navigating through a storm.
You appear calm and reliable from the outside, yet inside your heart you’re facing intense emotional waves. But that very complexity is your greatest charm. The characteristics of ISTP-TD can be summarized as follows:
- Possess genius-level ability to solve problems with your hands
- Love freedom and hate constraints more than anything
- Though poor at emotional expression, can show affection through actions
Your emotional fluctuations may sometimes confuse those around you. However, it’s precisely because of that rich inner world that you can deeply savor life.
Please don’t feel ashamed of not being “normal.” If you can understand your true self and learn to control it well, a wonderful life awaits you. After all, ISTP-TD is a unique, irreplaceable existence – the only one of its kind in the world.
FAQや注意点
HAXACOの結果と、16personalities（通称MBTI診断）やMBTI（本家）と結果が変わる
- 性格は遺伝と環境の影響を受けるため、環境が変われば回答も変わります（例、疲れてると情動性が変化するなど）。遺伝について詳しくはこちら。
- 年齢次第で回答のブレがあります。詳しくはこちら。
- タイプ分類は各数値が3以上、3未満で行っているため、3に近い値だと、質問の聞き方やその時の環境次第で結果が変わりやすくなります。タイプよりも数値を見てください。
- MBTI（本家）や16personalities（通称MBTI診断）は質問設計の段階でどの程度統計的な処理をしているか論文が見当たらないため不明確です。一方で、ビッグファイブやHEXACOはそういった論文が簡単に見つかりますし、今回のHEXACO-JP診断は論文ベースです。
- MBTIや16personalitiesは普段の行動（学力・年収など）や、脳・遺伝などとの比較した研究論文があまり多くない一方で、ビッグファイブやHEXACOは数多く存在します。
- そもそもHEXACOはビッグファイブの要素の変形なので似て非なるものです。HEXACOの正直・謙虚さは、ビッグファイブの協調性と神経症傾向から抽出されています。下記「補足」参考。
その他にもご質問があれば運営者のトキワ（@etokiwa999）までご連絡ください。
性格診断の結果はあくまで人生の「ヒント」まで
先にも書きましたが、性格は遺伝と環境の影響を受けます。遺伝の影響で、ブレ幅は一定ですが、環境次第である程度答えがブレます。
またビッグファイブやHEXACOの研究論文では学力や年収などと相関分析をしていますが、自然科学の実験ほど大きな相関係数ではありません。相関係数は最小-1、最大1ですが、だいたい-0.4～0.4ほどが多いです。もちろん高いものもあります。0.8や0.9ではなく、それに比べたら低いです。
ただそれでも様々な研究はありますので、「占い以上、自然科学未満」と思ってください。心理学や占いを100％否定しているわけではありません。
補足
16personalities（通称MBTI診断）の概要
16personalities（16タイプ性格診断）は、MBTI（Myers-Briggs Type Indicator）とビッグファイブをベースにして作られています。
厳密には16personalitiesとMBTIは別物なのです。
MBTIは、ユングの心理学的類型論を基に開発された性格診断ツールです。
16personalitiesはMBTIの4つの指標（E外向-I内向、S感覚-N直観、T思考-F感情、J判断-P知覚）を採用しつつ、アイデンティティ（AとT）という指標の追加、独自の質問項目・評価基準を設けています。
この性格診断の良いところとしては、韓国アイドルが広めたり、恋愛マッチングアプリでも使われたりするなど、とても有名で、回答数がとても多いことにあります。それを利用して分析して論文として公開すれば信頼性は高いかもしれません。
ただし、悪いところとしては、科学的な裏付けが弱いところがあります。査読付き論文の数が少ない、統計処理の方法が不明確、性格と学力・収入・脳機能・遺伝的要因などとの関連性について十分な根拠が提示されていない、などが理由です。
MBTI（本家）の概要
MBTIは性格を16タイプに分類する心理学の理論です。
そもそもMBTIとは、マイヤーズ・ブリッグス・タイプ・インジケーター（Myers-Briggs Type Indicator）の略称です。
MBTIでは、以下の4つの指標を組み合わせて性格を16タイプに分類します。
- 外向性（Extraversion）か内向性（Introversion）
- 感覚（Sensing）か直観（iNtuition）
- 思考（Thinking）か感情（Feeling）
- 判断（Judging）か知覚（Perceiving）
つまり、MBTIでは自分の性格傾向を「ISTJ」や「ENFP」などの4文字で表現するのです。
16personalitiesよりは論文は存在しますが、ビッグファイブやHEXACOほど頑健な研究結果が出ているわけではありません。
ビッグファイブの概要
性格心理学において最も有力な特性理論の一つが「ビッグファイブ（Big Five）」です。
ビッグファイブは、開放性、誠実性、外向性、協調性、神経症傾向の5つの特性を測定します。
また、16personalitiesやMBTIはタイプ分類（例、外向的か内向的かのどちらか）を用いるのに対して、ビッグファイブが特性を連続的な数値で評価する（例、外向性3.5）点も大きな違いです。
さらに、古くから研究されており、論文数も多く、学力や所得、脳や遺伝など、他の分野でも多くの研究が行われています。ビッグファイブの方が比較的、科学的な裏付けが強いと言えます。
MBTI・ビッグファイブ・HEXACOの相関関係
MBTIの4指標とビッグファイブの5因子には相関関係があります。
この相関を示した代表的な研究に、「The relationship between the revised NEO-Personality Inventory and the Myers-Briggs Type Indicator」という論文があります。
また、MBTI（本家）とビッグファイブを参考にして作られた16personalities（通称MBTI診断）では、ビッグファイブの神経症傾向が「アイデンティティ」と呼ばれており、自信（Assertive）か、慎重（Turbulent）かで分類されています。
これらの関係をまとめたのが以下の図です。
一番右には、比較的新しい性格診断である「HEXACO（ヘキサコ）」があります。ビッグファイブに1つ指標「正直・謙虚さ」を加えて改良され、ダーク特性（倫理観）が分かるようになりました。
今回のHEXACO-JP性格診断では16personalitiesの5文字に加えて、ダークD/ライトLを付けてより詳細に分析できるようにしています。
Writer & Supervisor: Eisuke Tokiwa
Personality Psychology Researcher / CEO, SUNBLAZE Inc.
As a child he experienced poverty, domestic abuse, bullying, truancy and dropping out of school — first-hand exposure to a range of social problems. He spent 10 years researching these issues and published Encyclopedia of Villains through Jiyukokuminsha. Since then he has independently researched the determinants of social problems and antisocial behavior (work, education, health, personality, genetics, region, etc.) and has published 2 peer-reviewed journal articles (Frontiers in Psychology, IEEE Access). His goal is to predict the occurrence of social problems. Spiky profile (WAIS-IV).
Expertise: Personality Psychology / Big Five / HEXACO / MBTI / Prediction of Social Problems
Researcher profiles: ORCID / Google Scholar / ResearchGate
Social & Books: X (@etokiwa999) / note / Amazon Author Page