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LangBytes · BJT

From zero to J2 in ~4.5 months: a realistic study plan for working professionals

· 4 min read

The short version

A candidate reported reaching J2 (a score of 420 to 529) about four and a half months after starting from zero, while working. That is one report. It does not say how many hours a week they studied or what language background they had, so treat it as an upper-limit example of what is possible, not a promise. This plan turns it into weekly blocks you can adjust. The study hours in it are LangBytes suggestions, not organiser guidance.

What is official, and what is not

  • Official: the BJT has 80 questions: Listening (25, about 45 minutes), Listening and reading (25, about 30) and Reading (30, 30). The score is 0 to 800, and J2 is 420 to 529. There is no pass or fail. Brochure, April 2026 · Level guide
  • Official: listening makes up two thirds of the questions (FAQ Q9). FAQ
  • Official: the test sets no vocabulary, grammar or kanji list, so there is no syllabus to finish. You are measured on business situations.
  • Candidate report (November 2026): about 4.5 months to J2 from zero, studying while working, with keigo first.

A four-block plan

Assume about one hour on weekdays and two on weekends, roughly nine hours a week. If you have less, stretch each block.

  • Weeks 1 to 4: the base. Kana, core grammar and the first few hundred words. Start keigo (尊敬語 and 謙譲語) in week 3. A candidate who reached J2 reported putting keigo first, so if you already have basic grammar, start it in week 1. Do not wait for "enough grammar".
  • Weeks 5 to 9: workplace language. Emails, phone calls, meetings and schedules. Keigo pairs and fixed phrases daily. Start listening to short business dialogues every day, even if you understand a third.
  • Weeks 10 to 14: exam format. Take a Part 3 section under time (30 questions in 30 minutes). Practise Part 2 with the options read before the audio. Take your first full mock exam at the end of week 12.
  • Weeks 15 to 19: pace and gaps. Two full mocks, then fix what they show. Use the mock's weak-concept list, not your feeling of what is weak. Rehearse the five-second answer window, which is a candidate report, not an organiser rule.

Weekly rhythm

  • Daily, 20 minutes: spaced review of new words and keigo forms.
  • Three evenings, 30 to 40 minutes: one skill at a time: listening, reading, or grammar and expressions.
  • Weekend, 2 hours: one timed section, then review the errors. In the last block, one full mock every two weeks.

How to read your mock score

  • A LangBytes mock score is a practice estimate on a 0 to 800 scale. It is not an official BJT score and not an equivalent.
  • Use the level range, not the single number. A 'likely range' that crosses a J boundary means you are near it.
  • When the estimate is consistently well inside J2 for two mocks, book the real test. Booking is possible from the next day if a Pearson VUE seat is free.

If you are slower or faster

  • Slower: a single report does not set your pace. Keep the order, move the weeks.
  • Faster, or with Japanese already: skip block 1 and start at keigo, then take a mock in week 3 to see where you are.
  • Aiming for 400 or 480: the ISA counts BJT 400+ as +10 and 480+ as +15 for HSP points. See our post on the retake interval before you plan sittings.

Sources