Slow Japan — the version we actually do as a family.
Japan's most famous onsen · 2.5 hrs from Tokyo
Soak in Japan's most famous hot springs — with the kids.
Gunma is home to Kusatsu, one of Japan's most celebrated onsen towns — and an easy few days to add onto your Tokyo trip. Here's how to enjoy the waters with little ones, from a dad who actually lives here.
Start here
Everything seen through one lens: how a family with young kids actually does it.
When to go, with kids
Each season changes what's easy with little ones — here's the family version of the calendar.
Local finds you won't read in English anywhere else
Tiny places with no website and no English — found through living here, not Googling.
The 200-yen village bath locals actually use
A tiny communal onsen up a back lane — how we took our toddler, and how to go respectfully.
A family-run noodle shop with a kids' corner
Grandma cooks, kids draw at the low table. Where it is and what to order.
A riverside spot the kids never want to leave
Shallow water, shade, and a snack stand — a stress-free afternoon near Karuizawa.
Famous spots — the with-kids version
Kusatsu and the big names have plenty of guides. Ours answer the question they don't: how does it go with children?
Ready-made family routes
Done-for-you weekends, paced for kids — what to do, in what order, with nap times intact.
36 Hours in Kusatsu with a toddler
Two slow days: the famous baths, a kid-friendly ryokan, and where to nap between.
A weekend in Karuizawa with little ones
Cool summer highlands, shallow rivers, and an easy base near the station.
Onsen + silk: a culture weekend for ages 4+
Kusatsu's waters plus Tomioka, kept short and lively for school-age kids.
Where to stay with kids
In an onsen town, the inn IS the trip. Here's what to actually look for — private baths, baby kit, allergy handling — and the honest truth about the labels.
Family ryokan with a private bath
The single biggest stress-saver with babies and shy toddlers — bathe on your own schedule, away from other guests.
Allergy-friendly inns in Kusatsu
Several inns offer allergen-elimination meals — what they cover, the notice they need, and the honest limit (a shared kitchen).
The truth about 'baby-welcome' labels
Why there's no third-party certified baby inn in Kusatsu — and the features to shop for instead.
The Nook Japandoesn't take bookings. When you've chosen, you book directly with the inn or a booking platform — we just help you choose well.
Where is Gunma?
Closer than you think
An easy hop from Tokyo — which is exactly why it works as a calm add-on with kids.
Plan it in taps — and ask us anything along the way
A few taps, no typing. Get a free family-shaped route, and we'll email you the plan.
Day 1 · Arrive & soak
Day 2 · The famous baths, slowly
Day 3 · Easy nature on the way back
This is a suggestion, not a booking. You'll book stays, transport and activities yourself through the links we recommend — The Nook Japandoesn't arrange travel or take payment for it.
The free "Gunma with kids" starter guide
One short email course. Real spots, real logistics, no fluff.
Hi, I'm the dad behind The Nook Japan
I live in Gunma with my wife (a local) and our two daughters. Everything here is the version of Japan we actually do as a family — including the small places you can't find in English. More about us →