The Hiyoca 35 was a fixed lens rangefinder camera distributed by I S Photo of Japan from 1957, for the worldwide export market. The camera was made for I S Photo by Royal Camera as a rebadged Royal 35P, and featured:
- Rangefinder-coupled Kendor f2.8 / 45mm lens, to f16, with 40.5mm filter size. The lens was presumably made by Tomioka.
- Unmarked shutter with speeds: B, 1, 1/2, 1/5, 1/10, 1/25, 1/50, 1/100, 1/300s.
- 10-blade aperture diaphragm giving a nearly circular pupil.
The body was simply engraved with 'Hiyoca' on top, and did not show the '35' model number. The rear door release panel was uniquely embossed with the maker's name 'DSK'.