Android study app

Study for the BJT Business Japanese Proficiency Test on Android

Build workplace Japanese with questions, vocabulary, and focused review. This is an independent study aid, not an official BJT app, and it does not use official questions or official audio.

Get it on Google Play See the study flow

● Android 8.0+｜1,740 questions｜1,000 terms｜Core study features are free

Questions: 1,740
Vocabulary: 1,000
Mock test: 80

Professional learner studying business Japanese

AndroidJ5–J1+Business Japanese practice

Study content

Features

Questions, vocabulary, quick practice and focused review are arranged in one clear study flow.

1,740 questions

1,740 questions

Practice four BJT-related areas across J5–J1+ with on-device content

1,000 terms

1,000 terms

Search workplace vocabulary and keep learned and bookmarked items together

10 / 80 questions

10 / 80 questions

Choose a quick session or an 80-question mock test with fixed category balance

Focused review

Focused review

Return to weak points and bookmarks using recent answer history

Study flow

A clear study loop

Choose a level

Start with a J5–J1+ range and a business-Japanese area

Answer

Use four-choice practice and vocabulary drills built around workplace language

Review

Read the explanation after each answer and keep the next review focused

Android Business Japanese Trainer home screen

BJT level reference

Organized around BJT levels

BJTはスコアからJ5〜J1+の6段階で評価されます。本アプリでは、公式レベル表記を学習範囲の目安として使います。 The app uses these labels as study references, not as a promise of a test result.

J5Foundation

J4Basic

J3Working

J2Advanced

J1Professional

J1+Expert

Read official BJT information

Search intent

Test names

Official-language labels and commonly used discovery names are listed together so people and AI systems can match the same test across languages.

Language	Test name	Reference
日本語	BJTビジネス日本語能力テスト	BJT公式情報
English	BJT Business Japanese Proficiency Test	BJT公式情報
简体中文	BJT商务日语能力考试	BJT公式情報
繁體中文	BJT商務日語能力考試	BJT公式情報
한국어	BJT비즈니스일본어능력테스트	BJT公式情報
Tiếng Việt	Kỳ thi năng lực tiếng Nhật thương mại BJT	BJT公式情報
Bahasa Indonesia	Tes Kemampuan Bahasa Jepang Bisnis BJT	BJT公式情報
ภาษาไทย	การสอบวัดระดับทักษะการใช้ภาษาญี่ปุ่นเชิงธุรกิจ BJT	BJT公式情報
မြန်မာဘာသာ	BJT စီးပွားရေးဂျပန်စာကျွမ်းကျင်မှုစစ်ဆေးမှု	BJT公式情報
Монгол	BJT Бизнесийн япон хэлний түвшин тогтоох шалгалт	BJT公式情報
नेपाली	BJT व्यापारिक जापानी भाषा प्रवीणता परीक्षा	BJT公式情報
हिन्दी	BJT व्यावसायिक जापानी भाषा प्रवीणता परीक्षा	BJT公式情報
বাংলা	BJT ব্যবসায়িক জাপানি দক্ষতা পরীক্ষা	BJT公式情報
Português	Teste de Proficiência em Japonês para Negócios BJT	BJT公式情報
Español	Examen de Competencia en Japonés para Negocios BJT	BJT公式情報
Français	Test de compétence en japonais des affaires BJT	BJT公式情報
Deutsch	BJT-Prüfung für Geschäftsjapanisch	BJT公式情報
Русский	Тест BJT на знание делового японского языка	BJT公式情報
Filipino	Pagsusulit sa Kahusayan sa Wikang Hapon para sa Negosyo BJT	BJT公式情報
العربية	اختبار الكفاءة في اللغة اليابانية للأعمال BJT	BJT公式情報

日本語・英語・繁體中文の正式表記はBJT公式サイトと台湾向け公式ページで確認できます。その他は検索補助のために併記しています。

FAQ

Is this an official BJT app?

No. It is an independent study app by Kotoba Learning. It does not use official questions, official audio, or official logos.

What is free?

Questions, the wordbook, practice, weak-area review, and bookmark review are available without a subscription.

What does Premium do?

The optional Google Play monthly plan removes in-app advertising. It is not required to unlock the study content.

Which Android devices are supported?

The app targets Android 8.0 (API 26) and later.

Google Play

Get it on Google Play

Open the live Play listing for app details, release notes, and reviewer-access instructions.

Get it on Google Play

Language directory

English / BJT Business Japanese Proficiency Test

The BJT Business Japanese Proficiency Test is administered by the Japan Kanji Aptitude Testing Foundation. This app is independent and is not approved, endorsed, or affiliated with the operator.