Trial cultivation tests were conducted in Tsukubamirai, Ibaraki (36°00’ N, 140°02’ E). The seed coat color of “Soramizuki” was yellowish-white with light brown hila, and its hundred seed weight was approximately 18–22 g. Its date of maturation, dehiscence resistance, lodging resistance, and the lowest pod height were similar to those of “Sachiyutaka A1 gou,” a variety suitable for mechanized harvesting. Demonstration tests using a combine harvester in farmers’ fields revealed that “Soramizuki” yielded 37% more than conventionally grown varieties such as “Satonohohoemi” and “Fukuyutaka.” Although its protein content was 3% lower than that of “Sachiyutaka A1 gou,” “Soramizuki” displayed tofu processing suitability on par with the excellent processing suitability of “Fukuyutaka.”