The hook
A mausoleum complex of impossible gold and lacquer set in a cedar forest two hours north of Tokyo — and the one place near the capital where being snowed in is the best thing that can happen to you.
01Why it's worth it
Tōshō-gū is the burial shrine of Tokugawa Ieyasu, the shōgun who unified Japan, and it is deliberately unlike the restraint that usually defines Japanese religious architecture: every surface carved, gilded and painted, the Yōmeimon gate so dense with detail it is nicknamed the "gate you can look at all day". The three wise monkeys and the sleeping cat are here, small carvings among hundreds.
But the complex is much larger than the one shrine, and that is the thing visitors most often get wrong. Rinnō-ji temple, the Futarasan shrine, and Taiyū-in — Iemitsu's mausoleum, quieter, darker and preferred by many to Tōshō-gū itself — all sit in the same cedar woods, linked by paths. The whole ensemble is UNESCO-listed as one site.
Beyond the shrines the town runs uphill into the mountains: the switchbacks of the Irohazaka road climb to Lake Chūzenji under the volcano Nantai, with Kegon Falls dropping 97 m beside it. Higher still, Yumoto is an onsen village. The Kanmangafuchi Abyss walk follows a lava gorge past a row of weathered stone Jizō statues that supposedly never counts the same twice.
02How to experience it
Tobu line from Asakusa; the combined transport-and-entry passes are worth it. Give it an overnight rather than a day trip — the shrines empty in late afternoon and the mountain half needs its own morning. Walk the whole temple complex, not just Tōshō-gū. Add Chūzenji and Kegon by bus if the weather is clear.
The honest note
Do not go on a Japanese public holiday, and check the Chinese and Korean ones too. An entire thread exists titled "Nikko Day Trip Disaster!", and the diagnosis in it was immediate: "Today is a national holiday so that definitely didn't help. Nikko tend to be packed around Oct/Nov due to fall foliage as well." Another commenter generalised it into the best single piece of Japan-trip advice on this page: "Always ALWAYS look up National Holidays before going to Japan. It's often a good idea to look up Chinese and Korrean national Holidays as well!"
Most people underuse it. The same thread contains the gentle correction that explains a lot of disappointed day trips: "Nikko has a whole temple complex beyond Toshugu and the walk through the forest is awesome. If you didn't explore more of the temple complex you kinda missed out :(. When I went that's all I did and took me most of the late morning and afternoon."
The mountain section is seasonal. Irohazaka and the lake are spectacular and also the exact reason November traffic seizes; in deep winter parts close.
It is cold — noticeably colder than Tokyo, at altitude, and that is the trade for the version below.
From the locals
The best account of Nikkō is not about the shrines at all. Asked what the most fun they had ever had in Japan was, one traveller picked winter here over anything else: "Impossible question. But I will choose being snowed in while staying in Nikko. I was the only guest in my hotel, with an onsen with snowy river view all to myself for three days. Dinner at a bar all alone on a snowy night with old American jazz playing in the background. Casablanca vibes."
That is the argument for the overnight, and against the day trip, in one paragraph.
The standard advice from Tokyo places it alongside the other classic escape and hints at the same thing: "Whilst in Tokyo do day-trips to Kamakura and Nikko (Nikko maybe even an overnighter)."