
Earth to Osaka…
When we previously visited the 2025 Osaka-Kansai Expo, we addressed a number of common complaints and criticisms that were floating around the Internet, but a new one emerged only recently: “It’s full of bugs!”
▼ A news report on the bugs.
I had encountered the bugs when I went. They were tiny things that look a little like really small mosquitoes but never landed on people, let alone bit anyone. They just kind of hovered over everyone’s heads in swarms like aphids. I only encountered them on the upper deck of the Grand Ring on the side that goes partly into the ocean, and only around sunset.
They were kind of creepy and unpleasant, but fairly mild compared with what you’d run into in a field or along a river. At the time, I was willing to give it the benefit of the doubt as one of those seasonal things like mayflies that run their course in a week or so.
▼ At first glance, you might think those specks in this photo taken from the Grand Ring are birds flying in the distance, but they’re really flies about a foot away from me.
Turns out I was wrong, and the Expo venue is now increasingly flooded with these little insects that have been identified as chironomids, more casually known as “non-biting midges” and even more casually known as “blind mosquitoes”, “lake flies”, “muckleheads”, “muffleheads”, “chizzywinks”, and other names, depending on the region.
According to reports, they are now seen in large numbers in lower parts of the Grand Ring and even near pavilions on the water side. Complaints about them have been coming in fast and furiously on social media.
▼ Yeah… they definitely weren’t this bad when I was there.
「閲覧注意」
— 市 (@0XXX0000) May 21, 2025
大屋根リングの虫まみれも酷いけど、コンビニ?内にまで虫が入ってるのとか、ヤバ過ぎる、、、#万博#万博ヤバイ#万博虫まみれ pic.twitter.com/ftRzCBjCNT
In response to this, Osaka Prefecture governor Hirofumi Yoshimura announced on 21 May that the prefecture has put in a request with Earth Chemical, Japan’s leading producer of pesticides… excuse me, “insect care products.” Yoshimura said he spoke directly with the president of Earth and that he is confident the knowledge they have gained in their vast experience would be put to good use here.
Among the typical cynicism found in online comments about the Expo, some readers of news wondered why Tokyo-based Earth Chemical was called in instead of the hometown insecticide producers at Kincho. Others wondered if a mass extermination is really in the spirit of the Expo.
“There must be some reason behind them asking Earth instead of Kincho, which is headquartered in Osaka.”
“Well, Earth was founded in Osaka and moved to Tokyo during the bubble era.”
“Sounds like the Expo’s theme has changed from ‘making life shine’ to ‘harvesting life.'”
“Sounds like the Expo’s going even deeper into the red paying for this.”
“I heard the chironomid season is until mid-July, so they better act fast or just wait it out.”
“The bugs were pretty bad near the water show.”
“Tropical fish or medaka would happily eat the larvae of those insects.”
“Poor flies… They’re not hurting anyone and die in a few days anyway. Why kill them just because they multiply in large numbers and are unpleasant?”
I tend to agree with that last comment in that, compared to most insects I’ve encountered throughout my life, those bugs are rather innocuous. And unless they’ve gotten bolder in recent days, they tend to just keep to themselves, albeit only a couple inches from people’s heads.
Also, I think if you’re going to build an enormous wooden structure as a symbol of humanity’s harmony with nature, you really should expect insects to be a part of that harmony too. Call me crazy, but launching a chemical attack on them feels a little out of step with that theme. At least using medaka to eat them has a certain circle-of-life quality to it.
Source: YTV News NNN. Hachima Kiko
Photos ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!


Attendees to Expo 2025 hit record numbers despite record numbers of bugs
Osaka Expo expected to turn an operating profit of over 23 billion yen
Osaka governor suggests lowering voting age to 0 to curb population decline
Anti-insect laser gun turrets designed by Osaka University, expected to work on roaches too
Fatal flop or fun? What is the 2025 World Expo in Osaka really like?
Japan’s best conveyor belt sushi restaurant of seven years ago has now, finally, come to Tokyo
Wisteria season starts early with blooming of Japan’s Great Wisteria in its beautiful garden
Starbucks Japan releases FIVE new Frappuccinos in a day, and we try them all in 90 minutes
Japanese trains in Sapporo might be better than those in Tokyo, thanks to one special feature
Fading Tokyo – Horikiri Station, the Arakawa River, and Kinpachi-sensei[Walking course]
Retro Japanese-style hotel room with kotatsu, free ice cream is both amazingly cool AND warm
Mt. Fuji decorated with a 500,000-flower pink carpet is Japan’s ultimate spring view
Pokémon store character meet-and-greet events to resume in May
Silicone testicle covers banned from Japanese sauna following cups being left behind and on shelves
Can a downtown Tokyo super sento bathhouse beat a hotel for a one-night stay?
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Lawson convenience store at popular tourist site is one of the most unusual in Japan
30 Pikachus want to share a Tokyo hotel room with you that has separate Grass, Water, Fire spaces
You can assemble a well-balanced team of Pokémon, them eat them, thanks to Japanese cake chain
Man bites woman at cherry blossom park in Japan, dies shortly after
7-Eleven Japan’s new baked-in-store sweet treat is only available in three parts of the country
Starbucks Japan closing only Shinkansen platform branch for popularity-triggered renovations
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Japan now has a special desk for people who work at home with a pet cat[Photos]
Famous Tokyo cherry blossom spot installs view-blocking screens to fight overcrowding[Video]
Uniqlo announces new T-shirts for One Piece, Naruto and more for manga publisher’s 100th birthday
Train station platform ramen store closes its doors on half a century of history in Tokyo
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Krispy Kreme releases Super Mario doughnuts in Japan for a limited time
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Japan’s newest Shinkansen has no seats…or passengers [Video]
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】
No more using real katana for tourism activities, Japan’s National Police Agency says
The Sushiro of the future to open at the Osaka-Kansai Expo 2025
Lock that opens when Osaka dialect is spoken unveiled at Expo 2025
Pocky maker Glico talk about their cellular regeneration breakthrough and new candy at Expo 2025
On-site coverage of the 2025 Osaka-Kansai Expo from our reporter’s mother