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Manga artist Takatoshi Yamada, known for “Dr. Coto’s Clinic,” has revealed on his Instagram that he’s lost a dramatic amount of weight. He says his weight dropped from 90kg a year ago to just 51kg, even though he wasn’t consciously dieting — he’d simply been eating only one meal a day. Citing the unexplained, rapid weight loss, he also disclosed that he is currently hospitalized undergoing detailed medical tests. Reactions on 5ch were split: some suspected cancer, while others pointed out that “if an illness caused that much weight loss, other symptoms should be showing up too.”
September 9, 2026, 9:01 AM
Manga artist Takatoshi Yamada, known for the hit series “Dr. Coto’s Clinic” and other works, updated his Instagram as of the 9th.
Back in August this year, Yamada had already reported that “my weight loss won’t stop.” According to Yamada, his weight plummeted from 90kg a year earlier to just 51kg in only six months. “I haven’t been dieting or trying to lose weight during this time — I just have no appetite at all, and I’ve been living on one meal a day,” he wrote.
Source: news.livedoor.com / Original article here
What people said
You never see fat old geezers, right? People naturally get thin as they age
There aren't any fat old guys because they die off before they get old
You won't find fat or tall people in nursing homes
Tall people don't tend to live that long either
There are actually
Studies show slightly chubby people are more likely to live past 100 in good health
It's been properly researched
Just how fat was he before?
Is he working on a Dr. Coto sequel?
Wonder what this guy's deal is
Go get looked at by Dr. Coto himself
Guess it's hard to tell just from a photo in cases like this?
It was a year, not half a year
Still way too much weight loss though
Losing more than half your body weight has to mean a serious illness
He'll practically ascend to heaven at that rate
He's turning into that flying-cloth yokai, Ittan-momen
Is the story up to around where his assistant has breast cancer, and the guy who gave up on becoming a doctor comes back to the island?
That's way too fat
My relative who had anorexia looked just like this
Guy really had it rough
He kept drawing hardcore villain characters and just never sold
He worked and worked and worked and worked, and finally made it big with Dr. Coto
Maybe he just stopped eating, the fat came off, and now he's actually at a normal weight
If a cancer were causing this much weight loss, some other symptom should have shown up by now
Yeah, I thought the same thing
https://ogre.natalie.mu/media/news/comic/2025/0404/yamadatakatoshi_2.jpg
He doesn't look that fat here, so maybe he's just tall
I don't think he was 90kg at this point
He was probably already lighter than that by then
Can't taste anything… could it be a brain disorder?
Actually they tend to die about as young as sumo wrestlers
Ikki Kajiwara (51)
Momoko Sakura (53)
Kentaro Miura (54)
Shotaro Ishinomori (60)
Osamu Tezuka (61)
Hiroo Terada (61)
Fujiko F Fujio (63)
Akira Toriyama (68)
Mitsuteru Yokoyama (69)
Fujio Akatsuka (72)
Takao Yaguchi (81)
Takao Saito (84)
Leiji Matsumoto (85)
Isao Kojima (87)
Fujiko Fujio A (88)
Kazuo Umezz (88)
Yoshiharu Tsuge (88)
Sanpei Shirato (89)
Shigeru Mizuki (93)
Takashi Yanase (94)
The comics have sold over 12 million copies total
At a 10% royalty rate that works out to roughly 600-700 million yen
Should be fine unless he's living some insanely extravagant lifestyle
He should've gone to the hospital sooner
Background and key points of this discussion
“Dr. Coto’s Clinic,” set around medicine on a remote island, is Yamada’s signature work and was also adapted into a TV drama. Reports on this weight loss have been inconsistent about the timeframe — both in his own posts and in news coverage — so the thread saw a mix of reactions, from people saying “he lost 40kg in six months” to others correcting that it was actually over a year. When someone loses a large amount of weight in a short period, doctors would typically consider things like digestive-system disease or thyroid dysfunction as possibilities, but as of September, Yamada himself has not disclosed a diagnosis, and the results of his hospital tests haven’t been made public. The thread shows both the view that it could be cancer and the counter-view that “if it were cancer, more symptoms would probably have shown up by now” — worth keeping in mind that the cause remains unconfirmed at this point.
*This article is compiled from excerpts and a summary of the 5ch (Entertainment/Sports News+) thread ““Dr. Coto” manga artist Takatoshi Yamada reports mysterious drastic weight loss of “-40kg in a year,” hospitalized for tests, says “I’m trying hard to eat”“.
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