Arti Kata 四六判

land-tax system during the Edo period under which the government took 40% of the year's crop and the farmers kept 60%

April 16 incident (arrests of communists and members of other anti-government groups; 1929)

around the clock

six to four ratio

land-tax rate during the Edo period (the government took 60 percent of the year's rice crop and the farmers kept 40 percent)

six-three-three-four system of education (six years of elementary school, three years each of junior and senior high school and four years of university)

64th note

nishimuku samurai (mnemonic for remembering the months with fewer than 31 days)

four kinds of birth in the six destinies

the 64 hexagrams (of the Book of Changes)

four balls

quarter (of a year)