In 1989, the Japan Umbrella Promotion Association designated June 11th, which coincides with the start of the rainy season according to the calendar, as "Umbrella Day." Moominvalley Park, operated by Moomin Monogatari Co., Ltd. (Headquarters: Hannō City, Saitama Prefecture, President: Kiyoshi Mochizuki), holds a "Hattifattener Day" campaign on the 11th of every month, and also holds umbrella-themed events during that period.As we are hosting "Moominvalley and Umbrellas," we will be running a special campaign on Thursday, June 11th this year to commemorate "Umbrella Day."
Next to the Umbrella Sky Road, which is currently adorned with hydrangeas in full bloom, a special photo prop called "Hattifattener Umbrella" will be set up for photography only on Thursday, June 11th. international success.
Along the Umbrella Sky Road, approximately 1000 hydrangea bushes are in full bloom."Umbrella Sky and Hydrangea Road" is a fantastical and photogenic space that can only be seen during this season.On rainy days, the ground reflects the umbrellas in the sky like a mirror, creating a magical scene different from that of sunny days. After the rain, raindrops splashing on umbrellas and hydrangea petals sparkle in the sunlight, further enhancing the beauty of the lush green lakeside.
In addition, We're also running a "Rainy Day Special Gift Campaign." Emma's Theatre has been renovated to be all-weather, so you can enjoy the characters' shows even if it rains. Be sure to enjoy the collaboration of umbrellas and hydrangeas at Moominvalley Park on Thursday, June 11th!
■ June 11th (Thursday) "Umbrella Day" x "Hattifattener Day" Event Details:https://metsa-hanno.com/event/45698/
■ "Moomin Valley and Umbrella" Event Details:https://metsa-hanno.com/lp/umbrella2026/
▶Take photos and videos perfect for "Umbrella Day" with the "Hattifattener Umbrella"!
"Umbrella Sky and Hydrangea Road"The hugely popular "Hattifattener umbrella," previously only available at Moominvalley Park, is now available as a photo prop that anyone can use.Enjoy taking photos perfect for "Umbrella Day" or the rainy season amidst the colorful umbrella sky above and the vibrant hydrangeas on the ground.
■Event Period: June 11, 2026 (Thursday)
■ Venue: Umbrella Sky and Hydrangea Road
▶The 11th of every month is "Hattifattener Day"
The 11th of every month is designated as "Hattifattener Day," and on that day, visitors will receive a Hattifattener Day art design clear card (not for sale) as a gift. You can take special photos by holding the clear card, which has a different design each month, up against the scenery.
Furthermore, we have prepared various special offers, such as a limited-edition wallpaper, the sale of limited-edition art lattes, and an extra ball in the arcade game "Nibbling Shop."
■Date: 11th of every month
▶ "Rainy Day Limited Gift Campaign" is currently underway.
We are currently running a "Rainy Day Limited Gift Campaign" where you can receive an original design postcard when you use the shops inside KOKEMUS on rainy days. The design will be renewed from June 13th (Saturday).The second wave of designs will feature Snufkin and Fillyjonk.
■Event Period: May 16th (Sat) - June 30th (Tue), 2026
*The event will proceed even if rain is forecast for the day. Please contact our staff for details.
*The event period may be changed without prior notice.
※ It will end as soon as it is gone.
*You cannot choose the design.
■Distribution locations: Various stores within KOKEMUS
●Main Shop Moominvalley: One free gift with purchases of 1,000 yen (tax included) or more per transaction.
●Restaurant Moominvalley: All customers who dine here
●Library Cafe: All customers who have a meal
▶【Phase 2】"Moomin Valley and Umbrellas" Photo & Movie Contest
We are currently holding the second phase of our photo contest to help you enjoy "Umbrella Sky and Hydrangea Road" even more.
Beautiful photos and videos of the umbrella sky.Hashtag "#UmbrellaPhotoContest2026"Please submit your post there.The grand prize winner will receive a special accommodation experience that includes admission to the park.
■Application period: May 16th (Sat) - June 30th (Tue), 2026
[Grand Prize] A pair of accommodation vouchers for a Moomin Special Room at the official Moomin Hotel (1 night with breakfast included)
■Target: Grand Prize (1 winner)
*You can choose your preferred hotel from the following three Marroad chain hotels.
・ Marroad Inn Hanno
・ Marroad Inn Omiya
・ Marodoin Hachioji
■ Accommodation period：2026年9月1日（火）～2027年3月31日（水）（※12月31日（木）と1月1日（金）は除きます）