
A humble mailbox with a roundabout connection to ’90s J-Pop idol group Mi-Ke.
In Japan, public mailboxes come in many shapes and sizes, but when it comes to the old-school cement pillar box types, they’re always painted red.

However, there is one old post box that isn’t red — it’s blue, and there’s only one spot in the country where you can see it: Chiba Prefecture.
Tokyo’s neighbouring prefecture of Chiba is a large one, though, so whereabouts in Chiba is it located? That’s a question a lot of Japanese people don’t know the answer to, and even our own reporter P.K. Sanjun had no idea it existed until he stumbled upon it while visiting the area with his family recently.
▼ The sign beside the post box proudly reads: “The only one in Japan! The town with the blue post box.”
Curious to find out the history behind the blue post box, P.K. did some research on it and discovered it was installed here in 2016, to great fanfare. In the years since, copycat blue postboxes have popped up here and there in Japan, but none of the old pillar boxes have this same sky-blue lustre, making it the pride of the town, and for good reason.
The mailbox was a joint creation between Japan Post and the town where it’s located, and it was designed to draw tourists and capture the magnificent local scenery of blue sky and sea, giving birth to its lovely shade of blue.
Where is the town, though? Well, if you’re a fans of ’90s J-Pop idol group Mi-Ke you might be able to hazard a guess. The name of the town features in one of their songs — a rare claim to fame for Chiba, which hardly ever gets a mention in the pop charts, compared to other towns in other prefectures — and it was once a big hit.
Still unsure of the location? Don’t worry — you’re not alone. P.K. himself kept us all guessing until he eventually revealed all in exchange for his favourite frozen curry.
Are you ready for the answer?
▼ Japan’s only blue mailbox is located in….Kujukuri Town!
Yes, that answer didn’t mean much to us either, until P.K. whipped out his phone and showed us a clip of Mi-Ke singing about the town on stage while showcasing their signature ’60s aesthetic.
▼ The 1991 song is called “Omoide no Kujukurihama” (“Memories of the Kujukuri Seaside“).
If that’s got you wanting to know more about Mi-Ke, P.K. highly recommends giving the group’s fifth single, “Shiroi Shiroi Sangoshou” (“White White Coral Reef”) a listen. He calls it a masterpiece, and it really shows the talent of vocalist Keiko Utoku, who went on to become a famous solo artist in Japan.
▼ Utoko also sang the opening and closing themes for the original version of the Sonic the Hedgehog CD video game.
As you can probably tell, P.K. has a bit of a soft spot for Mi-Ke, which made his visit to Kujukuri all the more special. He certainly hadn’t expected it to be such a peaceful seaside location, and he hadn’t expected it to be home to a blue post box either, but when he searched for mentions of the pillar box on Instagram, he found it was actually quite a popular spot for Instagram selfies.
▼ The mailbox is located at “Seaside Plaza Kujukuri“.
It’s not just the blue paint that makes this box so special — the yellow paint on the “Post” sign stands out as different as well.
The cheerful look of the unusual post box gives it a charming, friendly characteristic that makes it even more unique. Of course, it’s more than just a local attraction, though — it’s a fully functioning post box so next time you feel like posting a letter, why not turn the errand into an excuse for a daytrip to the seaside? And you can pop by the shrine with the fishy torii gate while you’re there!
Site Information
Seaside Plaza Kujukuri / 海の駅 九十九里
Address: Chiba-ken, Sambu Gun, Kujukuricho, Kozeki 2347-98
千葉県山武郡九十九里町小関2347-98
Website
References: Kujukuri Town, Chiba Nipposha, Wikipedia
Photos ©SoraNews24 unless otherwise noted
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]





These creative, fanciful post boxes from Japan will delight you in so many ways【Photos】
There’s something fishy about this mysterious tourist spot in Japan
Japanese government considering tripling departure taxes to combat overtourism
Bear attack shelters going on sale in Japan as country experiences record-high number of incidents
We zapped up some tasty hot sandwiches in the microwave with 3COINS’ new gadget from Japan
Why is Starbucks Japan’s Christmas stollen so good?
Secret tourist stop in Japan has a lift car that whisks you away to a mystery mountain destination
Burger King Japan’s Great King Yeti is the latest evolution of One Pounders
Studio Ghibli unveils new fluffy purses from films like My Neighbour Totoro and Spirited Away
How to find a lost cat: Unique method from Japan proves to be surprisingly effective
Totoro, Catbus sleeping bags are perfect place to stay cozy all winter…if you fit inside【Pics】
Studio Ghibli releases new anime tea and mugs in Japan
Brand-new Pokémon park opens in Japan with larger-than-life-size Lapras【Photos】
Naturally brown-haired Osaka student sues government for forcing her to dye her hair black
Starbucks Japan unveils the new Soupuccino
Tokyo Station’s ultra-rare cakes look, and taste, like a cup of coffee
One of the busiest stations in Tokyo is changing the name on its signs, but not necessarily to make it easier for people to find their way around.
Never forget that Mister Donut’s super-simple ramen is actually very hard to beat
Entry to Tokyo’s Pokémon theme park zone has physical fitness requirement, will cost a lot
Japan’s permanent Pokémon theme park zone announces grand opening date, ticket sale start
Studio Ghibli releases new Ursula’s blanket from Kiki’s Delivery Service
Studio Ghibli releases new “komorebi” plush toys to brighten your days
Sanrio and Sonic the Hedgehog characters become fast friends with new plushie collection
Tokyo bento boxed lunch shop charges different prices depending on how heavy your laptop is
Japan has vending machines that put protective film on your phone for you — Here’s how to use them
Studio Ghibli anime stoles are here to keep you warm with a range of famous characters
Totoro fountain figurine recreates the sights and sounds of one of anime’s most memorable scenes
Starbucks Japan unveils new Christmas Frappuccino and holiday drinks for 2025
Ghibli Museum clock is now yours to take home with you
Step into Japanese culture with Converse’s new Japan-exclusive shoes featuring gods, sushi style
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Possessing Harry Potter’s Sword of Godric Gryffindor is now illegal in Japan
Japan’s deadliest food claims more victims, but why do people keep eating it for New Year’s?
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
The top 10 annoying foreign tourist behaviors on trains, as chosen by Japanese people【Survey】
No more using real katana for tourism activities, Japan’s National Police Agency says
One of Japan’s most beautiful hot spring towns announces new limits on number of day trippers
Leave a Reply