Tove Jansson Akebono children's forest moomin valley park with puisto in the background

Night light up, Christmas events, Stargazing parties and general information for Tove Jansson Akebono Children’s Forest (formerly Moomin Valley) in Hanno City, Saitama Prefecture near Tokyo. Last update July 1st 2024.

Tove Jansson Akebono Children’s Forest

Once nicknamed “Moomin House” and now known as “Mushroom House” the quirky building pictured below is one of three buildings (and a cafe added in 2018) in this free, unique and imaginative theme park for children in Hanno City; Tove Jansson Akebono Children’s Forest Park

Once you leave your shoes at the door (which we didn’t on our first visit, cringe) you’re free to roam the house and discover the nooks and crannies. There are 3 floors and a basement to explore. When the night illumination began at the park you could also enter this building on select nights. However, that was suspended due to the pandemic. Now you can only admire the building from the outside at night and only when the night illumination event is on. (Skip to night illumination information).

Mushroom House

Until 2018, before Metsa opened, the mushroom house used to be nicknamed “Moomin House”. The upper floors have little beds and items laid out to make it look like someone lives there.  There are doors, windows, cubby holes, secret spaces, stair cases and lots more to captivate the littlest of minds. The park is geared to children, but there are few safety measures in place, so I recommend you stay close to your kids as they climb in the main house.  You might also want to watch your own head; I bumped mine a few times!

Inside the mushroom house at the former Moomin Valley, Tove Jansson Akebono Children's Forest in Hanno city, Saitama prefecture

In spring viola and in summer portuluca flowers grow in front of the mushroom house.

Facility Management Building

The facility management building is another stunningly designed earthen building with lots of intricate detail. There is a wall waterfall in the open plan lobby. You can walk along the roof, where there is a small lookout tower which doubles as a prime photo spot.

Beautiful wood architecture in the management facility building of Tove Jansson Akebono Children's Forest Park

In the Facility Management building there is a large play area with handmade toys the kids can play with. The park is open until 5, but the playroom closes at 4. Occasionally, they have events on in this room.  The management building houses the toilets, including one with a baby keep and changing area. You are requested to bring used nappies home with you.

Tove Jansson Library

The 3rd building is an information station and reading area with books and a seats. Since about 2019 they are calling it “Mori no Ie” 森の家 or the Forest House. There is a selection of books including some Moomin stories. They have some great encyclopedia type books about insects and beetles too. They also have some Moomin motifs and posters in this building. The architecture is once again stunning, with some unique features such as the acorn shaped window.

Tove Jansson Akebono Children’s Forest

Bridge in Moomin Valley

Behind the building with the reading room is one of the nature trails and the route to the waterfall, as well as the tree house pictured below. The tree house has recently been rebuilt.

Tree house moomin valley

Other details

Night Light up & Stargazing Parties

Tove Jansson Akebono Children’s Forest is lit up at night every Saturday, Sunday and public holiday throughout the year, weather permitting. The lights are turned on at dusk and stay on until 9 pm 8.30 pm. In addition, they have stargazing events on select dates. This is a free event and anyone can participate. No advance registration necessary. Again, the event is dependent on the weather and maybe cancelled last minute if the weather is unsuitable to stargazing.

Tove Jansson Mushroom House lit up

The next stargazing event is on August 10th and 11th 2024. They will also have extra light up dates in August for Obon. They are Wednesday August 14th and Thursday August 15th. That is in addition to the usual weekend light ups. You can check their Facebook Page or official website for the most up-to-date information.

Christmas Events

Before the pandemic, Tove Jansson had a gorgeous Christmas event with Santa Claus. Unfortunately, Santa Claus has been unable to visit the park since the pandemic began. But in 2022, there will be some Christmas events – on December 3rd, 11th, 17th, 24th and 25th. On the 3rd and 11th they will have Christmas crafts for small children. On the 17th, 24th and 25th they will have Christmas concerts in the afternoon. Unfortunately, each of their Christmas events is limited to a small number of people, so if you want to participate you will need to arrive early to get a participation ticket.

Tove Jansson Park Information

Moomin Valley Overview

Tove Jansson Akebono Children’s Forest Park, aka Moomin Valley, official hours are Tuesday to Sunday from 9 am to 5 pm. However, when there is night light up, which is most Saturdays and Sundays, the park is open until 9 pm. The park is closed on Mondays. In 2012 I nicknamed this park “Saitama’s best kept secret”, because at the time it was. However, the news of Metsa opening changed all that and the park has enjoyed increased tourism in the last 2 years.

Metsa is a Finnish and Moomin Theme Park and it will be the first Moomin Theme Park to open outside of Finland. It comprises a free area called Metsa Village and an area you have to pay into called Moominvalley park. It has been on the horizon for a few years now, but completion has been delayed numerous times. *It finally opened in part in 2018 and completely in 2019.


Vending Machines in the Tove Jansson Akebono Children's Forest Park in Hanno City, Saitama Prefecture near Tokyo

The current park is free in and suitable for rainy days.  I noticed an unsightly air conditioning unit out the back of Moomin’s house, so I assuming they use it in the summer.  There is a small shop at the edge of the car park, but they don’t sell much in the way of food.  They do have ice-cream! It is only open on select days. On June 1st 2018 Puisto Cafe was opened. You can get a light lunch in the form of an open sandwich or a dessert here. They have great coffee and smoothies too.   There are vending machines halfway up the slope that leads to the park, that sell both drinks and ice-creams.

When we first visited years ago the park wasn’t really suitable for strollers, but now it is except in the forest where the waterfall is. If you are planning to visit the waterfall I suggest you park your buggy at the management facility building. It is a lovely area to hike in though, but some of the hiking trails will be lost with the development of METSA.

Yama no Susume

For anime lovers, this park is used as the back drop in the second season, episode 20, of the anime Yama no susume, “Climb of Encouragement“. You can see the anime images compared with the real life scenery in this blog article here:


Despite the opening of Metsa, this park – now named Tove Jansson Akebono Children’s forest – is still quite hard to find. They have added some new sign posts and I imagine as the opening of Metsa draws close they will add even more. Please see the access section for detailed information on the park’s location.

By Car

Moomin Valley is approximately 20 minutes from both the Sayama-Hidaka and Iruma Interchanges of the Ken-o expressway.  The park is situated behind Hanno’s city public gym and hockey courts.  There is a Cainz beside it which is probably the best landmark.  They are on prefectural route 195; 9 kilometres from route 16 if you come off the Ken-o expressway at the Iruma Interchange.  Prefectural road 195 also meets up with route 407 which is the road I took from Sakado.  The road is quite busy and only one lane for a lot of the journey. The car park is in the grounds of Hanno’s Taiikukan.

By train

It is about a 20 minute walk from Motokaji 元加治 Station on the Seibu Ikebukuro line.




To extend your playtime in Hanno, just across the road you can enjoy the playground in Asu Sports Park . And a short drive away is Metsa and Moominvalley Park.

View on Google Maps.

Update in 2018: Cafe Puisto

A new building, a cafe, opened June 1st 2018. And it is just as quirky and unique as the other buildings in Tove Jansson’s Akebono Children’s Forest Park aka Moomin Valley:

Cafe Puisto in the original Moomin Valley


    1. Author

      🙂 Maybe someday I can go see for myself! Are the Moomins still shown on TV and in comics in Finland? The old cartoons are shown on one station in Japan 🙂

      1. Oh yes, all the time and everywhere. And they have made some newer version with puppets too.

        1. Author

          I wonder will the newer version be shown in Japan at some stage. Or maybe they already are and I just don’t know! Just googled the newer version; very cute. 🙂

    1. Author

      I thought so, but bloody Wikipedia told me Sweden!! Better fix that.

        1. Author

          I re-read it earlier and it’s my own fault for skimming it, because it does actually explain it was written in the Swedish language in Finland… and lots of other stuff. Usually, I don’t trust it a 100% either; for something really important I check a few resources, but I was in a hurry last night!! 🙂

    2. Author

      Just remembered I put it in a link from FB, not in the actual post. Phew! Still need to fix that though, thanks for the heads up.

  1. Wow, I love to bring my kids to Moomin Valley! We went to Saitama and visited various parks there but never know about this amazing place. Thanks for sharing this best kept secret-toddler-friendly-location!

    1. Author

      Yeah, thanks for that feedback. I’m glad you found somewhere new to try out; especially as I found a fun day out on your blog. 😉

    1. And thank you for commenting Clark. Lovely part of Saitama Hanno, great hikes in the area too. Although, with the development of Metsa the Moomin Theme park some of the courses have been lost.

  2. Looks amazing there. A truly wonderful place to go and explore!

    1. We are very lucky to be spoilt for choice of places to explore, but this one is definitely one of the faves in the quirky category 🙂 Thank you so much for commenting.

  3. OMG! This is so adorable. I love Moomins but never knew there was such a place! Thanks so much for this blog post!

    1. I love how unique the Moomin characters are. They are really popular here in Japan so there are lots of places you can get Moomin branded goods and there are even two Moomin cafes in Tokyo!!

    1. They weren’t that big in Ireland when I was growing up, but Japan really loves the Moomin characters!

  4. omg the place looks like magic! Have never heard of the Moomins before, thank you so much for the post, it is great.

    1. So interesting how we all grow up with different cartoons and story books. Moomins wasn’t that big in Ireland, but we did have the books in the library. I was so surprised how popular the Moomins are here in Japan.

  5. This sounds like a fantastic place! I would love to go there some day. I will add this to my bucket list!

    1. Thank you so much 🙂 I hope you do indeed get the chance to go, so many great places to see here in Japan.

    1. That is a really great way to put it, so true – just like something from a fairy tale. Thank you for commenting.

  6. How fun. It really looks like something out of a fairy tales. My nieces and nephew would get such a thrill visiting this enchanted location.

    1. It really is great fun for the kids. Thanks a million for commenting.

  7. I want to take my kids there! it looks bizarre, but in a good way… I like visiting places that are so unique… thanks for the heads up!

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