Akae ware was produced from the Edo to the Meiji periods. Fukushima Buzan is considered the foremost master of Akae, so famous that it's said he painted everything. This is likely a piece painted by the Living National Treasure, Fukushima Buzan. The difference in style is probably because it was made in his early, unknown period. It's said that his early works were not well-received. Using the 12 colors of eboshi, the status and rank were represented, from left to right, with the highest ranks: ultra-high purple, blue, red, yellow, white, and black. It was forbidden to use colors of a higher rank than one's own, a practice known as kinjiki (forbidden colors). Since there are similar pieces made as deep saucers, it's undoubtedly from the Edo period. The deep saucer culture is definitively from the Edo period, so even without a mark, it can be considered valuable as a similar item. It's an antique. It was found in a storehouse built during the Edo and Meiji periods.