Jinku (Japanese: 甚句, Hepburn: jinku, [dʑŋku], lit. "excessive verse" or "lively song") is a form of traditional and folkloric Japanese songs.

The actual form of jinku songs probably appeared in the Edo period. Jinku is a vocal performance using verses. These songs often depicts qualities of character, love stories, worklife, or comedic situations.

Like the dodoitsu genre, jinku uses lyrics constituted by one chorus of 7, 7, 7, 5. Each song can be divided in 6 parts.:^[1]

• Utamakura (まくら唄), an often repeated descriptive epithet
• Honuta (本唄), the main body of the song
• Hayashi (はやし), the accompaniment of meaningless words in the song for rhythm
• Honuta (本唄), the resumption of the main body of the song
• Maeuta (前唄), the prelude to the song's end
• Atouta (後唄), the encore

Tsugarujinku (Japanese: 津軽甚句, Hepburn: tsugarujinku, [tsɡrudʑŋku]) is a folkloric song often performed with a variety of instruments, such as shamisen, Japanese flute (Shakuhachi) or Japanese drums (Taiko). It birthed in the Aomori prefecture, either in Tsugaru or Hirosaki, and is commonly used to accompany a traditional dance bearing the same name. The genre is also called "Dodarebachi" from the first words of most songs.^[2]

Sumojinku (Japanese: 相撲甚句, Hepburn: sumojinku, [sɯmoːdʑŋku]) is one of the most popular and known form of jinku. It is performed a capella by yobidashi or sumo wrestlers during sumo celebrations, such as danpatsu-shiki or regional tours.
The yobidashi are traditionally given the task of composing jinku even though it is now quite common to have wrestlers composing it. It is often distributed in three sub genres: meisho jinku (名所甚句), glorifying songs; o iwai jinku (お祝甚句), festive songs; and owarai jinku (お笑い甚句), comedic songs.^[4]

Sumojinku follows a precise sequence in which the singer occupy the center of the dohyo and sing with an open fan while wrestlers circles him and punctuate the song with hands gestures and exclamations like "hoi" and "dosukoi"^[3] while moving around the singer. Every rikishi, no matter his rank, can participate to a jinku song, even those in the lower ranks. They're all given a keshō-mawashi, either borrowed from a senior wrestler or their own, for the occasion. However, only sekitori gets to wear their ōichōmage.

Some wrestlers are well known for their ability to sing traditional jinku such as Ikioi,^[5] Daishi or Konishiki.^[6]

Makouta (Japanese: 馬子唄, Hepburn: makouta) is a worksong originating from the Iwate Province. It is originally the song of bakuro horse trainers. It was sung as the bakuro rode at night, to overcome boredom and loneliness, to let people know where the horse rider was and also to prevent rabbits and foxes from jumping out of the grass along the road to startle the horses.^[9]

Kisarazujinku (Japanese: 木更津甚句, Hepburn: kisarazujinku) is a genre of jinku song originating from Kisarazu. It was sung by fishermen at sea or during seine fishing^[10]