How Important Is Japanese in the IT World?

Many people think "coding is in English, so I don't need Japanese" -- that is a huge mistake. Here is the day-to-day reality at Japanese companies:

A reality often overlooked: Even at companies that claim to be "bilingual," internal meetings and Slack channels are often still in Japanese. The ability to read and understand Japanese will largely determine how effectively you can work.

Required JLPT Level by Company Type

Japanese language requirements depend heavily on the type of company you work at:

Company Type Minimum Level Notes
Startup / Global Company English is often sufficient But long-term career prospects are still broader with Japanese
Mid-size Japanese Company JLPT N3 minimum N2 is highly recommended for effective communication
Enterprise / Bank N2 or N1 nearly mandatory All documentation and communication in Japanese

Generally speaking, JLPT N2 is the professional standard that opens the most doors. N3 is enough to get by, but N2 allows you to genuinely contribute in meetings, write reports, and build deeper working relationships.

JLPT N2 study materials for IT engineers in Japan

Technical IT Terms in Japanese

These terms will not appear in standard JLPT textbooks, but you will hear them every single day at the office:

Development Terms

Japanese Romaji Meaning
実装 jissou implementation
設計 sekkei design / architecture
デプロイ depuroi deploy
不具合 fuguai bug / defect
仕様 shiyou specification
レビュー rebyuu review
単体テスト tantai tesuto unit test
展開 tenkai deployment / rollout

Process & Meeting Terms

Japanese Romaji Meaning
朝会 choukai morning meeting
報告 houkoku report
打ち合わせ uchiawase meeting / discussion
手順書 tejunsho procedure manual
要件定義 youken teigi requirement definition
基本設計 kihon sekkei basic design
詳細設計 shousai sekkei detailed design
Tip: Create dedicated flashcards for these terms in Anki. Keep them separate from your regular JLPT deck. You will use these far more often than standard N2 vocabulary.

Keigo (敬語) at the Office

In a Japanese work environment, keigo is mandatory during choukai (朝会) and formal communication. This is not just about politeness -- it demonstrates professionalism and the ability to adapt to a Japanese workplace.

Example Houkoku (Daily Report) Pattern

Notice the use of ～ております (te orimasu) as the polite form, rather than ～ています (te imasu). In a Japanese business context, ～ております conveys humility (kenjougo, humble speech) which is the appropriate register when reporting on your own work.

This houkoku pattern is critically important because it is used every day during choukai. Memorize the structure, then swap in the content relevant to your work that day.

Japanese in Code Reviews

Code comments and pull request reviews are often written in Japanese. Here are examples of comments you will frequently encounter:

Being able to read and write comments like these will greatly improve your daily workflow. Start simple -- read your coworkers' comments, then gradually try writing your own.

Language-Based Soft Skills

Japanese at the office is not just about grammar and vocabulary. There are cultural aspects that are deeply tied to how you communicate:

Important: These soft skills cannot be learned from books. Observe your Japanese coworkers, pay attention to how they communicate in meetings and on Slack, and gradually adapt your communication style.
Whiteboard with Japanese technical terms in IT office

Study Tips for Engineers Learning Japanese

Start now. Do not wait until you receive a job offer -- the language learning process takes years. Realistic targets: N3 as a minimum, N2 as the professional standard.

Recommended Tools

Engineer-Specific Strategies

A realistic note: Do not get discouraged if you still struggle in meetings even after passing N2. Workplace language is different from exam language. What matters most is consistency in studying and the courage to keep trying.

Japanese Language and Your Career

Japanese language ability is not just about surviving at the office -- it directly impacts your career opportunities and visa status:

Japanese is a long-term investment. Every kanji you memorize, every sentence pattern you master, will pay for itself many times over throughout your career in Japan.