東海道しんかんせんで、はじめての 夜行列車が 走りました。
八月九日の 夜 十時ごろ、東京を 出発しました。
とちゅうの 駅で 六時間 止まり、十日の 朝 七時に 京都と おおさかに 着きました。
りょう金は 一人 一万五千円です。
Why six school grades, and not N5–N1?
Because that is how Japanese children learn to read. Japan's Ministry of Education fixes exactly which character belongs to which grade — so "grade 3" is a boundary you can verify, not a feeling. Every article here is machine-checked: if a single character sits above its grade, it is not published.
The result: you never hit a character you have not learned. That is the whole reason this product exists.