What is a Japanese poem called?

Haiku: Which is when you write about one specific moment generally in nature. It consist of three lines and as many verses as you care to have. The syllables are 5 for the first line, 7 for the second line, and 5 for the third and last line. In haiku you can't tell what your talking about but show it.

Haibun: This is written the same exact way as a haiku three lines and syllables but in this you have to express the feeling you had during that moment.

Senyru: This is the same structure as a haiku but is about human nature usually in a dark way.

Tanka: This is written with 5 lines but in this syllable pattern: 5-7-5-7-7. A good tanka has one theme through out the whole poem. The Tanka can have as many verses as needed. When reading a tanka it's better to have two readers one person reads the first verse and the second person reads the next one, etc. Tanka's are usually written about everyday things.

Dodoitsu: This is written about love or humor of the moment. It is usually not just a poem but can also be sang as a folk song. the syllable pattern is 7-7-7-5.

Renga: This is a fun competition like poem. You do it with two people. This has 5 lines per verse and can have as many verses as you wish. The syllable pattern is the same as a tanka. You do this by the first person writing two lines in a verse and then the next person writes the last three lines. It is usually fast moving and you don't have a lot of time to think.