Nestled in a quiet back alley just a short walk from JR Tamachi Station and Mita Subway Station, "Japanese cuisine Seizan" is a culinary gem. The owner, Haruhiko Yamamoto, is a prodigy who honed his skills at the prestigious "Japanese cuisine Takada Hassho" in Gifu, where he was appointed branch manager at the young age of 25.Since establishing his own restaurant in Mita in 2011, he has rapidly earned accolades, now proudly listed among the "Tabelog SILVER 2026," leading the way in Tokyo's Japanese dining scene. Yamamoto's cooking style captivates many food enthusiasts with its straightforward and sincere approach, focusing on top-quality ingredients carefully selected from across the country, combined with his exceptional techniques.• Miyagi Prefecture Blue Crab Meat and Roe with Okra A stunning opening dish that leaves a lasting impression. The delicate sweetness of the blue crab, raised in the rich waters of Miyagi, intertwines beautifully with the rich, creamy roe. The okra adds a gentle texture, creating a remarkable start that highlights the concentrated umami of the roe.• Awaji Island White Sweet Sea Bream in Clear Soup This dish features the high-end white sweet sea bream from Awaji, known for its refined fat and sweetness, served in a clear soup with finely sliced root vegetables. The clear broth is astonishingly gentle, enhancing the tender texture of the sea bream.• Saroma Lake Shima Ebi (Sweet Shrimp) with Kombu, Torigai (Cockle), Akou (Red Sea Bream), and Aomori Abalone An impressive sashimi platter. The Shima Ebi from Saroma Lake, carefully marinated in kombu, has had its moisture drawn out, concentrating its umami to the maximum. Its rich sweetness and sticky texture elevate it to a level beyond that of premium sweet shrimp. The meaty texture of the Torigai, the firmness of the Akou, and the oceanic aroma of the Aomori abalone create a beautiful balance on the plate.• Fresh Somen from Shodoshima, New Onions from Awaji Island, Konoko (Sea Cucumber Roe) A delightful surprise of the evening. The "fresh somen" from Shodoshima, which is rarely available, offers a powerful chewiness and a delightful texture that is a world apart from the usual dried noodles. The refreshing sweetness of the new onions from Awaji Island combines with the intense briny flavor of the Konoko, resulting in a sensuous taste experience.• Grilled Eel from Aichi Isshiki with Sweet Long Peppers from Fushimi The eel from Aichi Isshiki is grilled to perfection by professionals, with the skin crisped to a delightful crunch while the flesh remains astonishingly plump and juicy. The slight bitterness of the sweet long peppers from Fushimi perfectly balances the rich fat of the eel.• Fried Rock Oyster from Maizuru with Thin Green Beans from Chiba Indulging in the "milk of the sea," the rock oyster from Maizuru is luxuriously fried. As you bite into the crispy coating, the rich essence bursts forth from the large oyster. The fresh thin green beans from Chiba provide a lovely accent.• Clams from Chiba, Red Eggplant from Kumamoto, and Flower Pepper While this dish is categorized as a "simmered dish," it possesses an overwhelming presence that transcends that classification. The clams from Chiba are remarkably thick, releasing an unprecedented umami with every bite. The Kumamoto red eggplant, which has absorbed this umami, melts in your mouth, while the seasonal flower pepper adds a vibrant aroma, elevating this dish to a splendid main course.• Amagi Shamo Chicken and Koshiabura (Wild Vegetable) Rice The finale features a rice dish made with the brand chicken, Amagi Shamo from Shizuoka, and the spring wild vegetable king, Koshiabura. The robust umami and chewiness of the chicken permeate each grain of rice, providing a satisfying volume that even men will appreciate. The unique slightly bitter flavor of the Koshiabura elegantly refines the overall impression.• Seasonal Fruits (Mango, Passion Fruit, Ice Cream, Cointreau) A dessert that combines the tropical acidity of ripe mango and passion fruit with cold ice cream. The finishing touch of Cointreau (orange liqueur) adds a delicate aroma, gracefully concluding the meal with a touch of elegance.The charm of "Seizan" lies in its ability to gather top-class seasonal ingredients from across Japan while presenting them in a way that is never ostentatious, allowing them to shine in their best form.What left a particularly deep impression this time were the "fresh somen from Shodoshima," which surprised me with its texture, and the "clams from Chiba," which overwhelmed me with their thickness. I can only admire Chef Yamamoto's skill in bringing out not only the classic high-end ingredients but also hidden gems in their finest state.To top it all off, the thoughtful gesture of sending me home with that exquisite chicken rice as a "souvenir" was perfect. From start to finish, it was a sublime experience that satisfied all my senses. I am eager to return to this remarkable establishment in a different season.