a side dish / a tangent, a digression, something to the side of the main thing

my wife

there's no place like home, home is where you hang your hat

the arrival of the sumo wrestlers at the tournament venue

(sumo) official sumo tournament

under the 律令 (Ritsuryō) system, a commander of three lesser 将軍 (shōgun) each commanding 3000 soldiers

Edo River / Edogawa (one of 23 special wards in Tokyo prefecture, Japan) / a surname

A true Tokyoite: one who was born and raised in the Japanese capital and whose parents are from Tokyo. One whose family has been from Tokyo for generations.

(calligraphy and typography) "Edo characters", distinctive calligraphic (and later, typographic) styles that were born in the Edo period

a tatami mat of the Edo (Tokyo) style