Informal

内々の

uchiuchi no

(not in accord with the usual regulations)

口語の

kōgo no

(language: reflecting everyday, non-ceremonious usage)

日常の

nichijō no

(not formal or ceremonious)

普段の

fudan no

(not formal or ceremonious)

褻の

ke no

(not formal or ceremonious)

非公式の

hikōshiki no

(not formal or ceremonious)

非公式の

hikōshiki no

(not in accord with the usual regulations)