From Rewind Worldwide:
“Sengoku’s first titanium model with all-out effort.
Sengoku, which has been tackling various new challenges such as the use of A7068, tri-metal designs, and even perforated metal, has finally released their first high-end titanium model.
It adopts an H-profile shape with a polygonal, finely graded tilt angle. It has a modest diameter that fits nicely in the hand, but has tremendous horsepower. During play, you can always catch the center of the yoyo, and even when you are playing with a lot of momentum, you can control the yoyo firmly without losing sight of it.
Both the bearings and string are specially made for the Ieyasu. The high-precision V-shaped bearing keeps the string in a centered position and keeps it in control during play. The thicker string that comes with the yo-yo is a special string handmade by a team member. The package is also handmade by the owner. There are no future plans for the string and package, making them rather collectible.
This Ieyasu is also a one-time special production, with no plans for any future runs.
This is the first titanium model, and is a high-end model that Sengoku has poured a lot of effort into producing.”



