Unit 1: 自己と他者 - Identity, Relationships and the Foundations of Japanese Communication
What this unit asks of you
Unit 1 builds the base for everything that follows: you describe yourself, your family, your school life and your relationships, and you begin to notice how Japanese encodes social distance. The core concepts are self-introduction conventions (姓名の順、呼称、あいさつ), polite register (です・ます体 versus 普通体), kinship and address terms (さん・くん・ちゃん・さま and why you never use さん for yourself), family vocabulary pairs (父/お父さん、兄/お兄さん), and basic sentence patterns that carry information in a fixed order - topic は, time, place で, object を, verb.
Traps that cost marks
The most common errors are mechanical but expensive. First, transferring English word order: Japanese puts the verb last, and modifiers precede the noun they modify. Second, mixing registers mid-text - a letter that opens with です・ます and slips into だ・である reads as careless. Third, using honorific prefixes on your own family when speaking to an outsider: say 父, not お父さん. Fourth, particle confusion between は (topic), が (subject/new information), に (destination, time point, recipient) and で (location of action, means). Fifth, overusing あなた - Japanese prefers names or titles, and あなた can sound accusatory.
Rule of thumb
Before writing or speaking, fix two decisions: who is the reader/listener, and what is our relative status? Register, address form and verb choice all follow from that single answer.
Worked example
A classmate asks about your family. Weak answer: 「私の家族は4人です。私のお父さんは会社員です。」 Strong answer: 「家族は4人です。父は会社員で、母は教師です。」 The strong version drops the redundant 私の (context already establishes it), uses the humble 父 in a conversation with an outsider, and joins clauses with the で form rather than repeating です.
Practice direction
Keep a vocabulary log organised by field (school, family, hobbies) and by register pair, so you can shift from casual to polite without hesitation.