
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
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
Highest Starbucks in Japan set to open this spring in the Tokyo sky
Last chance coming up for amazing east Japan for all-you-can-ride Shinkansen-inclusive train pass
Japan has a new bar just for people thinking about quitting their jobs, and the drinks are free
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Yakuzen ramen restaurant in Tokyo is very different to a yakuza ramen restaurant
Saitama is home to the best strawberries in Japan that you’ve probably never even heard of
566 million yen in gold bars donated to Japanese city’s water bureau
Japanese video 18-Year-Old Grandpa has important, moving message behind its silly-sounding title
Second ramen restaurant in Tokyo receives Michelin star for 2017
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Is Sapporio’s Snow Festival awesome enough to be worth visiting even if you hate the snow? [Pics]
Japan has trams that say “sorry” while they ride around town…but why?
Tokyo Skytree turns pink for the cherry blossom season
Sakura Totoro is here to get spring started early with adorable pouches and plushies
Poop is in full bloom at the Unko Museums for cherry blossom season
Shibuya Station’s Hachiko Gate and Yamanote Line stairway locations change next month
Japan’s new “Cunte” contact lenses aren’t pronounced like you’re probably thinking they are
Japan’s newest Shinkansen has no seats…or passengers [Video]
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
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
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