
Japan is well known for both its love and skill of robots. Free of the terminator-induced prejudices of western cultures, they have blazed the way for robotic tour guides, waitresses, fish, singers, hairdressers, waste baskets, cyclists, rock-paper-scissors players, cockroaches, butts…
With so many robots, it’s hard to come up with an original one. But they are still out there. Tokyo University’s Center for the Study of Robotics came up with Denta-kun, the calculator using robot. Just to make it clear, the robot does not calculate. It just uses a calculator.
The name is derived from the Japanese word dentaku (calculator) and uses the suffix kun, which is kind of like Mr. but much less formal and often used with children. Kind of like if you say, “hey mister turtle!”
A video demonstration was made and uploaded to video sharing site NicoNico, but it can be a little confusing so a brief explanation is needed.
The video opens with someone coming across Sorobon, which is an abacus using robot. Ignoring the ironic subtext of Sorobon, they are inspired to take it to the next level by making a calculator-using robot.
First they craft the parts needed and assemble the robot. Next they design and build its circuitry, and when it’s all together they dub it Denta-kun.
Initial testing was rough, with Denta-kun flailing about wildly and producing wrong answers. However the bugs were soon smoothed out and Denta-kun was punching buttons like a pro.
The next step was to convert it from a completely pointless robot to a mildly useful one by replacing the keyboard input with a voice command system. With improved speed as well, Denta-kun could finally take verbal calculations and quickly provide answers.
Now enjoy the show.
I had a lot of fun questioning the purpose of Denta-kun, but in reality this cute little robot could potentially improve my quality of life greatly.
You see, I suffer from a condition called left-handedness. It’s a disease which afflicts nearly ten percent of the population, including Barack Obama and Luke Skywalker. As a result, I cannot use the number pad on the right side of my keyboard. Check it out. Cobwebs are forming on it.
If Denta-kun could be modified to fit onto a keyboard, then I wouldn’t be mocked for my disability anymore. No sir, no more mocking for me with my yellow rubber glove robot hand punching number keys.
Source: NicoNico (Japanese)


Rakuten’s Tokyo robot delivery service both is and isn’t what it promised, but is cute either way
Japan’s new Pokémon jackets give you the look and powers of the Kanto starter trio
Sanrio amusement park in Tokyo to host Psycho Game horror event this summer[Video]
What are the worst things about living in the Japanese countryside?[Survey]
Tokyo store makes you to pass a quiz in order to buy Pokémon cards as part of anti-scalper policy
War in Iran threatening Japan’s pudding production
Brand-new Square Enix Cafe to open in Tokyo…and in Los Angeles too!
Dorayaki from 89-year-old Japanese confectionery shop is one of the best sweets hidden in Tokyo
Tokyo Station’s perfect breakfast spot might just be this izakaya Japanese-style pub
What’s up with the “mosquito buzz” noise at Shibuya Station?
Studio Ghibli releases fluffy My Neighbour Totoro T-shirts that’ll have you touching your chest all day long
New Kyoto Converse sneakers celebrate Japan with traditional kimono fabrics for your feet
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Studio Ghibli launches huge new anime movie T-shirt collection with special design details
Tifa’s Final Fantasy VII bar is going to pop up in real-world Tokyo
Japanese convenience store gives away free ice cream with creative ad at Shinjuku Station
Japan is so hungry for workers it used up its five-year visa quota in record time
Tsujihan sushi bowl restaurant goes viral with foreign tourists, but is it worth the hype?
Hello Kitty is now a transforming truck robot[Photos]
7-Eleven Japan’s cooked-in-store takoyaki is here! How does it fare against the street food king?
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Wisteria season starts early with blooming of Japan’s Great Wisteria in its beautiful garden
Japan’s best conveyor belt sushi restaurant of seven years ago has now, finally, come to Tokyo
Brand-new Pokémon manhole covers coming to help the recovery of a disaster-stricken part of Japan
Japan’s awesomely beautiful Alpen Route snow corridor is now open
Injuries on stairs in Tokyo highlight an overlooked design flaw
Mt. Fuji decorated with a 500,000-flower pink carpet is Japan’s ultimate spring view
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
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