Ipponmatsu

Ippon-Matsu is the owner of the weapons shop in Loguetown Roronoa Zoro visited. He was the previous owner of two of Zoro's swords, Sandai Kitetsu and Yubashiri.

Loguetown Arc
When he first met Zoro, he acted polite due to Zoro being his first customer in a long time (due to Marine Captain Smoker arresting pirates, who are potential customers), but changed to a more gruff attitude when discovered that Zoro only had 100,000 with him. However, upon seeing the Wado Ichimonji on Zoro, he tried to rip him off by buying it for less than what it was worth, until Tashigi entered the shop. His greedy attitude changed when Zoro tested his luck with the Sandai Kitetsu (he threw it up into the air, then held out his arm to see if it would be sliced off), which defied Ippon-Matsu's refusal to sell it due to the curse on the blade.

After being impressed by Zoro's willingness to test his luck against Sandai Kitetsu and its curse he gave him Yubashiri as well as Sandai Kitetsu for free. Yubashiri was his family's heirloom, a sword passed down through his family from one swordsman to the next until it reached him. His willingness to part with the sword, he told his wife, was that he was simply passing on to Zoro his dream.

Two Years Later
Ippon-Matsu is seen two years later cleaning his bathroom, while behind him is an enlarged poster of Zoro, which he is proudly talking about with his wife.

Trivia

 * Ippon-Matsu made a guest appearance in the The Detective Memoirs of Chief Straw Hat Luffy TV special.
 * In Volume 11, Chapter 97, the crest-like piece of hair on Ippon-Matsu's forehead moved back and forth from pointiing up to pointing down several times in the chapter.