Yamada Chemical Co., Ltd. Onsen Tamago Maker (Soft Boiled Egg Maker) No microwave needed! Just pour hot water in the sink. No need to worry about time. Authentic soft-boiled eggs in about 13 minutes. ‐ Mercari: Shop from Japan

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Yamada Chemical Co., Ltd. Onsen Tamago Maker (Soft Boiled Egg Maker) No microwave needed! Just pour hot water in the sink. No need to worry about time. Authentic soft-boiled eggs in about 13 minutes. ‐ Mercari: Shop from Japan