Japan Agriculture (JA) restricts the size and shape of vegetables. Blemishes are not allowed to be sold in the market, creating a tiered system for veggies that is based on looks and not necessarily quality.
These vegetables were grown by Dennis van den Brink at Niseko Green Farm, a 100% organic farm in Hokkaido. He has to be sensitive to market demands but still grows things that are odd in Japan like Delicata squash.
Hokkaido is known for potatoes and they are specifically sweeter. Everyone we have talked to agrees that the Japanese palette is oriented towards sweetness, which makes it harder to grow heirloom varieties as they tend to have more acid and be brighter.