Teimon school (of haikai)
A historical school of haikai poetry founded by Matsunaga Teitoku in the early Edo period. The term is a proper noun referring to this specific literary school.
Teimon is a school of haikai founded by Matsunaga Teitoku.
From the name of the founder, Matsunaga Teitoku (松永貞徳), using the character 貞 from his name and 門 meaning 'gate' or 'school'.