Tonfa
The tonfa (Okinawan: トンファー tonfā, Japanese: 旋棍; rōmaji: senkon Chinese: 柺; pinyin: guǎi lit. old man's staff / "crutch", also spelled as tongfa or tuifa, also known as T-baton) is a melee weapon with its origins in the armed component of Okinawan martial arts where it is known as the tunkua.