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Numbers, Counters, Time & Dates

Numbers, counters, telling time, days, months and dates
助数詞の音便
counter sound changes
counter euphony
Systematic sound changes: 一本ippon, 三本sanbon
助数詞の選択
choosing the right counter
counter selection
Matching counters to object types
時間の長さ: ～間
duration: -kan
-kan
3時間 = 3 hours; 1週間 = 1 week
頻度: ～回, ～度
frequency: -kai, -do
-kai / -do
週に3回 = 3 times a week
順序: ～番, ～番目
order: -ban, -banme
-ban / -banme
1番目 = the first; ordinal expressions
概数表現
approximate numbers
yaku, gurai, zengo
約, ぐらい, 前後 = approximately/around
割合: ～割, パーセント
proportion: wari, percent
wari / paasento
3割 = 30%; 割 is a traditional tenths unit
日付の読み方
reading dates
date readings
Irregular readings for 1st–10th of month
時刻の応用
advanced time expressions
-sugi, -mae, han
3時半 = 3:30; 5分前 = 5 to
年号: 令和, 平成
Japanese era names
Reiwa, Heisei
Imperial era counting alongside Western years