Shimotsuki Kozaburo

Shimotsuki Kozaburo is a member of the Shimotsuki Family and a swordsmith who crafted the Great Grade Meito Wado Ichimonji and Enma. He was born in Wano Country, but illegally departed from there over 50 years ago.

Abilities and Powers
Kozaburo is an extremely capable swordsmith, as he was able to craft the extremely powerful blades Wado Ichimonji and Enma, the latter of which forces the user to use large amounts of Busoshoku Haki.

History
Kozaburo constructed the swords Wado Ichimonji and Enma, which were classified as Great Grade Meito. Over 50 years before the present day, he illegally left Wano Country. He left Enma there, where it would eventually come into Kozuki Oden's possession. It is unknown where Kozaburo went, but Wado Ichimonji ultimately ended up with Kuina in an East Blue town known as Shimotsuki Village, which shares its name with Kozaburo's family.

Trivia

 * His name is very structurally similar to Koushirou, a native of Shimotsuki Village, Kuina's father, and Roronoa Zoro's teacher; both names begin with Kou and end with rou, and contain a number in the middle: zabu meaning three and shi meaning four.