The somonka is a type of Japanese poem that actually consists of two shorter poems called tanka, a brief 31-syllable form, with somonka usually being exchanged by lovers or between two poets. Generally speaking, the first tanka is a love poem to the second person and the second tanka is the lover’s response.
The katuata, which some sources refer to as the katauta, is a Japanese half-poem intended to be a question for a lover. It uses a similar structure to the haiku, opting for a 5-7-7 or 5-7-5 syllable structure, being different mainly in its theming and intended purpose.
The kouta is a brief Japanese verse form, usually consisting of four lines but sometimes five, that tends to celebrate the average person’s everyday life in song. It seems to have been at its most popular during the Muromachi era (roughly the 14th-16th centuries), but it still sees use in modern Japan.