一年の計は元旦にあり いちねんのけいはがんたんにあり the whole year's plans should be made on New Year's Day exp proverb Advanced ➥
百マス計算 ひゃくマスけいさん ひゃくますけいさん method of learning through repetition which involves multiplying and other calculations carried out on a 10-by-10 grid of numbers n Advanced ➥