Roronoa Zoro's first sword in the "One Piece" series is named Wado Ichimonji. Wado Ichimonji is a treasured family heirloom that originally belonged to Kuina, Zoro's childhood friend and rival. After Kuina's untimely death, Zoro inherited the sword as a symbol of their promise to become the world's greatest swordsmen.

Wado Ichimonji is a high-quality katana with a white hilt and a slightly curved blade. It is known for its exceptional sharpness and durability. As Zoro's primary sword, Wado Ichimonji is often seen at his side during battles and is an integral part of his fighting style.

The sword holds sentimental value for Zoro, serving as a reminder of his past and his determination to fulfill his promise to Kuina.

Wado Ichimonji is a symbol of his dedication to honing his swordsmanship skills and achieving his goal of becoming the greatest swordsman in the world.