Karakuri Rasento

The Karakuri Rasento is a special, mechanized sword wielded by Sasaki.

Appearance
From the outside, the Karakuri Rasento looks like a broad-bladed sword with light, greenish-gray tsuka-ito forming rhombus gaps on the hilt (being gold-colored below) and an orange pair of tufted cords tied to it, a gold kashira, a rectangular tsuba that is also gold, and a saya colored the same as the tsuka-ito.

The sword itself has a very distinct appearance: it consists of a plain, single-edged blade with several smaller, blade-like flaps that are attached to one of its sides in diagonal segments. When Sasaki activates the rotating mechanism of his weapon, the flaps open up into a perpendincular position to the main blade before they start spinning at high speeds. In this active form, the sword ends up resembling a drill.

Abilities
The Karakuri Rasento is a powerful weapon while active, since the drilling rotation produced by the sword's mechanisms naturally enhance the strength of Sasaki's attacks. With this weapon, Sasaki was able to overwhelm the General Franky and cut his Franken sword in half.

Sasaki can also use his sword while airborne in half-triceratops form, giving him a method of aerial combat.

Techniques

 * Heliceratops: While airborne through his propeller frills, Sasaki approaches his enemy from the air and uses his Karakuri Rasento to repeatedly slice them with diagonal swings. It was first used against the Gifters of his Armored Division, who had changed sides thanks to Tama's ability.

Trivia

 * Holdem, Sasaki's fellow Headliner in the Beasts Pirates, also owns a mechanized sword, which he refers as Karakuri-to. Unlike Sasaki's, however, Holdem's sword capabilities are unknown, although the anime gives it whip-like stretching abilities.