Learn Japanese through games — pick a level, play a few minutes, and remember words longer than by rote. Vocabulary by real-life topic, plus leaderboards to compete with friends.
Boki Level 3 accounting vocabulary（簿記3級） 仕訳, 借方, 貸方, 減価償却 — 50 core words for Japan's most popular accounting certificate. 借方 doesn't mean "borrowing", and that's exactly where it gets tricky.
Boki Level 2 accounting vocabulary（簿記2級） 資本金, のれん, 製造間接費, 損益分岐点 — the level job ads list as a requirement, including the 工業簿記 half that Level 3 never touches.
Boki Level 1 accounting vocabulary（簿記1級） 履行義務, 退職給付債務, 連結精算表, 埋没原価 — the vocabulary of listed companies' financial statements and of numbers used only for decision-making.
Construction site vocabulary（建設現場） 玉掛け, 墨出し, 開口部, せーの — words from the construction site that aren't in any textbook, including the call when two people lift together.
Nursing care vocabulary（介護の現場） 移乗, 誤嚥, 申し送り — 50 items from nursing homes, starting with what you must say before touching someone.
Food factory vocabulary（食品工場） 異物混入, 段取り替え, 消費期限 — words on the production line, and why a single hair is a big deal.
Metalworking factory vocabulary（機械・金属） ノギス, 公差, バリ取り — measuring, turning, welding, stamping, reading drawings, and why gloves are banned on rotating machines.
Japanese farming vocabulary（農業の現場） 摘果, 誘引, 選果 — work in a 40-degree greenhouse, sorting and boxing, and the weather words that decide today's tasks.
Sewing factory vocabulary（縫製工場） 縫い代, 返し縫い, 目飛び — you can sew, but if you can't name it in Japanese you're still watching the person next to you.
Restaurant work vocabulary（外食の現場） お通し, 仕込み, ラストオーダー — polite language for customers and shouts to the kitchen, both at once during rush hour.
Car repair vocabulary（自動車整備） 車検, 異音, 工賃, 代車 — half the day holding a wrench, half explaining the estimate to the car owner.
Building cleaning vocabulary（ビル清掃） 共用部, ワックスがけ, 清掃中 — a job you do alone for the whole shift, plus a dedicated level for hotel housekeeping.
Warehouse logistics vocabulary（物流倉庫） ピッキング, ロケーション, 誤出荷 — the six jobs shared out in a warehouse, the paperwork, and forklift blind spots.
Japanese for taking your child to the doctor（小児科ナビ） Understand the 問診票 before the appointment and describe your child's stuffy nose, wheezing and shortness of breath — 60 words and phrases from the pediatric clinic.
Japanese at the dermatologist（皮膚科ナビ） Describe skin problems correctly: カサカサ or ジュクジュク, とびひ or あせも — 50 words and phrases from the dermatology clinic, plus how thick to apply ointment.
Japanese at the ENT clinic（耳鼻科ナビ） A child pulling at their ear and crying at night, snoring, can't blow their nose — 50 words and phrases from the ENT clinic, from symptoms to nasal suction and eardrum procedures.
Japanese at the eye doctor（眼科ナビ） Red, crusty eyes, or a school vision test sheet marked B? 50 words and phrases from the eye clinic: 視力検査, 散瞳, glasses, and how to use eye drops.
Japanese for prenatal care and childbirth（妊娠・出産） From the pregnancy test to bringing the baby home: 内診, 逆子, 切迫早産, and いきんで vs いきまないで in the delivery room — 60 words and phrases.
Mimikara N1 vocabulary（耳から N1） The complete 耳から覚える N1, 20 words a day. Every card has related words — remember the characters faster than rote learning.
Mimikara N2 vocabulary（耳から N2） All 1,181 words of 耳から覚える N2, 20 words a day. Flip the cards to learn the characters, then take a timed test.
Try! N1 vocabulary（N1 語彙） All 1,117 words in the 語彙リスト of TRY! N1, 20 words a day. Flip cards to learn the characters, then take a timed test — 56 days to finish the book.
Try! N2 vocabulary（N2 語彙） All 1,060 words in the 語彙リスト of TRY! N2, in the order of the book's 14 chapters. 20 words a day, flip cards then take a timed test — 53 days to finish the book.
Try! N3 vocabulary（N3 語彙） All 1,035 words in the 語彙リスト of TRY! N3, in the order of the book's 11 chapters. 20 words a day, flip cards then take a timed test — 52 days to finish the book.
Mimikara N3 vocabulary（耳から N3） 880 words from 耳から覚える N3, 20 words a day in the book's order — 44 days to finish the set.
Speak Japanese better in 30 days（話し上手30日） Grammatically correct but blunt sentences sound like reading out homework. Each day, three patterns of connectives and adverbs like おそらく, 確かに, とはいえ — pick the better way to say it from 4 options, listen, then repeat. 30 days, three minutes a day.
Japanese speaking reflexes（反射道場） You get a prompt in your language and say the Japanese sentence out loud within 60 seconds — 253 common grammar patterns from N5 to N1, 24 levels from 十級 to 名人, filterable by level. Stuck? Get a grammar hint, then grade yourself.
Kanji tank N5（漢字タンクN5） Kanji parachute down — pick the right reading from 4 options to make your tank fire. The full N5 kanji set split into levels, with a Study mode to preview them — reading practice under real time pressure.
Kanji tank N4（漢字タンクN4） The full N4 kanji set falls onto the battlefield — pick the right reading to fire, study each level first and then test yourself. Shoot earlier for more points, consecutive hits build a combo.
Kanji tank N3（漢字タンクN3） The full N3 kanji set split into levels of about 60 characters — study first to get familiar, then play rounds of 10 random characters and climb the ranks.
Kanji tank N2（漢字タンクN2） The full N2 kanji set — work, economy, society — falling faster and faster. Study each level, read under pressure, and retry exactly the characters you just missed.
Kanji tank N1（漢字タンクN1） The toughest N1 kanji, split into levels — rare characters that are impressive to read. Study first, then shoot; every round has 10 random characters so it never repeats.
Hiragana alphabet tank（ひらがなタンク） The targets don't show letters — they play a sound. Listen, then hit the right character among 4 options. Learn all 46 basic hiragana row by row through the 五十音 chart, then the voiced が・ざ・だ・ば・ぱ — no romaji, no typing.
Katakana alphabet tank（カタカナタンク） The targets don't show letters — they play a sound. Listen, then hit the right katakana among 4 options. Learn all 46 basic katakana row by row through the 五十音 chart, then the voiced ガ・ザ・ダ・バ・パ — no romaji, no typing.
Read Japanese names（名前道場） How do you read 田中? Pick the right reading from 4 options and climb 9 weight classes from easy to "brain teaser".
Guess the onomatopoeia（ぺらぺら） What do ドキドキ, ワクワク, フワフワ… mean? A quiz on the 50 most common onomatopoeic words.
Japanese adverbs quiz（やっぱり） やっぱり, ちゃんと, なかなか… — the seasoning that makes speech natural and easier to follow.
Japanese conjunctions quiz（だから） でも, だから, つまり… — the glue between sentences, so you don't lose the thread in long conversations.
Guess the proverb from emoji（絵文字会話） 🐒🌳💥 = 猿も木から落ちる? Decode emoji into ことわざ — once you guess it, you'll remember it.
Serve sushi in Japanese（寿司ラッシュ） Customers order マグロ, いくら… — tap the right plate before they get angry! A speed game with 12 dishes.
Order drinks at an izakaya（とりあえず生） 生ビール, ハイボール, 熱燗… — know how to order drinks and understand izakaya culture.
Japanese counters quiz（数え方道場） Cats are counted with 匹, rabbits with 羽, movies with 本?! Master counter words and sound changes like いっぽん・さんぼん.
Pick the right okurigana（送り仮名キャッチ） 起きる or 起る? 短い or 短かい? Get the okurigana wrong and Japanese people notice right away.
Understand youth slang（若者言葉） それな, 草, 推し, ワンチャン — all over LINE and YouTube, but no textbook teaches it.
Spot the fake kanji（そっくり漢字） One 未 hiding in a grid full of 末 — find it before time runs out as the grid grows.
Learn Japanese traffic signs（道路標識） 53 signs drawn to the official 標識令 standard: red rings prohibit, blue backgrounds guide, yellow diamonds warn. Each sign notes its trap — 徐行 and 止まれ share the same red triangle.
Japanese driving theory mock test（学科試験） Real 仮免 and 本免 questions: every one is just 正 or 誤, and you need 90% to pass. Tap words in the question to see their reading and meaning; after answering, the underlying rule is shown.
Build kanji from radicals（部首パズル） 木+木=林, 日+月=明 — understand that kanji are built from parts and you can guess characters you've never seen.