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embryo - Gullfoss

A massive body over 63mm wide that dramatically boosts your trick success rate... a model built for the contest stage!

This is a tri-material signature model created for Hiroki Katsumata, the 2026 SJ 1A Division Champion. Exceeding 63mm in width, it ranks among the largest of any 1A model, and its weight tops 70g. On paper, the numbers may give the impression of a big, heavy yo-yo, but the moment you actually play it, that impression is overturned in the best possible way.

The wide profile offers a larger surface to catch the string, so even difficult tricks see a noticeable drop in mistakes. Its tri-material construction, pairing a stainless steel inner rim with a polycarbonate wing, pushes weight toward the outer edge while taming the runaway, hard-to-stop feel that often comes with larger yo-yos. The shape is also carefully refined so that finger-based tricks such as chopsticks remain easy to perform, a detail well worth noting.

The result is a yo-yo that, despite its width, never feels overly wide, delivering a straightforward, easy-to-handle experience. It is precisely the model we want players who think "I d

embryo [Museum]

Gullfoss