Seizanso

Little knownBarely documented in English. This is the kind of place the site exists for.

Researched and written by Hinato

SeizansoTokugawa MitsukuniMito Komonretirement villaHitachiota

Ibaraki · Hitachiota

36.5419°N, 140.5070°E

Ibaraki's geography does a lot of the work at Seizanso — the rest is knowing when to show up.

Tokugawa Mitsukuni is one of the most recognisable figures in Japan — as Mito Komon, the disguised elderly lord of a long-running television series, he is known to essentially everyone over forty. The historical man retired from the lordship of Mito in 1691 and spent his last nine years here, in a deliberately plain thatched house in the hills of Hitachiota, supervising the compilation of the Dai Nihonshi, the vast history of Japan that his domain worked on for two and a half centuries.

The house is small and unshowy on purpose. What surrounds it is not: a hillside garden of moss, stream and old trees that is at its best in late autumn. It is still owned by the Tokugawa family, which is part of why the admission is high for what is a modest building — and also why it has not been turned into anything else.

Visiting essentials

Best season

Late November for autumn colour in the garden | Fresh green in May

How long to allow

60–90 minutes

Hours

9:00 AM – 4:00 PM | Last entry 3:30 PM

Closed: Open year-round | Occasional closures in severe weather

Entry fee

¥1,200 adults | ¥900 elementary and junior high school students | Group rates for 30 or more

Getting there

Getting there in detail

Shinjuku-cho, Hitachiota. Car recommended. Admission ¥1,200 adults and ¥900 for elementary and junior high school students, with group rates for parties of 30 or more. Open year-round, with occasional closures in severe weather.

Beyond the guidebook

**Understand who lived here before you pay.** ¥1,200 for a small thatched house is only worth it if you know that this is where the Dai Nihonshi was overseen and that the man in question is a household name in Japan. Ten minutes of background transforms the visit. **The garden is the larger half.** Moss, a stream and mature trees on a hillside, laid out to be walked. Late November is the peak; the house alone would not justify the trip. **Four o'clock is a hard close.** Last entry is 3:30 PM and the site is out in the hills. Do not leave this to the end of a day. **Pair it with Ryujin.** The suspension bridge is about forty minutes further into the same hills, and the two make a full day out of Hitachiota, a city that otherwise sees no visitors at all.

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