Rurouni Kenshin BIG Edition 4 collects volumes 10-12 and features story and art by Nobuhiro Watsuki.

Kenshin journeys to the home of Arai Shakku, the legendary swordsmith who forged his sakabato, in the hope of procuring a replacement for the blade that was shattered in a fight with Seta Sojiro. Instead of Shakku, though, Kenshin finds his son Seiku, who has given up making instruments of death.But when word gets around that before he passed away Shakku forged a final blade, one of Shishio's warriors also decides to pay a visit, and he doesn't plan on leaving empty-handed. With the safety of Seiku's family at risk, Kenshin springs into action, even if it means fighting without a weapon at his side!

Next, Kenshin realizes that if he is to defeat Shishio the time has come to complete his training in Hiten Mitsurugi-ryu. But first he will have to convince his incredibly stubborn master, Hiko Seijuro, that he is indeed worthy of Hiten Mitsurugi's greatest secrets and techniques. Then, with all ten of his Juppongatana "Ten Swords" fighters now in Kyoto, Shishio kicks his scheme to radically alter the face of Meiji Era Japan into high gear. Can Kenshin, Saito, and Misao marshal their resources in time to prevent Shishio from burning Kyoto to the ground?