What is the meaning of Koku?

A unit of measure in feudal Japan, the amount of rice needed to feed one person for a year.

cocurriculum; extracurriculum

Rōmaji transcription of こく

inflection of koks:

1. accusative/instrumental singular
2. genitive plural

accusative/instrumental singular

genitive plural

cocurriculum; extracurriculum

smell, odor/odour

stench, stink, pungency

inkling, sign, indication

Source: wiktionary.org