
Tokyo district says Detective Conan singer can once again use the name that everyone else already calls her.
On Thursday, presiding judge Tomoyuki Tobisawa handed down his verdict in a lawsuit heard in Tokyo district court. After considering the assertations made by both sides in the lawsuit, and carefully weighing them against codified law, Tobisawa came to the conclusion that yes, Rina Aiuchi is allowed to call herself Rina Aiuchi.
Ordinarily, that wouldn’t be the sort of thing you’d need official judiciary permission for. And no, this wasn’t a kanji kerfuffle, like the one that caused the Pokémon Center to issue an apology for calling Nicole Fujita Nicole Fujita. Instead, the lawsuit was necessary to untangle a legal dispute between Aiuchi and talent agency Giza Artist.
Though she never rose to quite the same heights as some of her more famous early 2000s J-pop contemporaries, Aiuchi carved out a respectable career as a high-energy vocalist, with her 2000 breakout single “Koi wa Thrill, Shock, Suspense” serving as an opening theme song for the Detective Conan anime TV series.
However, Aiuchi was born Rikako Kakiuchi. Rina Aiuchi is the stage name she took when she signed her debut contract in 1999 with Giza Artist, and that contract included a clause that the agency would retain exclusive rights to the Rina Aiuchi name in perpetuity, even after the end of their talent management contract for her.
Aiuchi and Giza’s working relationship ended in 2010, meaning that when she decided to return to singing in 2015, she had to do so under yet another stage name, Rika Kakiuchi, which she later changed once more to just R.
▼ Aiuchi performing a self-cover of “Ohh! Paradise Taste!!”, originally released in 2000
Recently, though, Aiuchi began using the Rina Aiuchi name in a professional capacity once again. In response, Giza Artist filed an injunction to block her use of the name, but that injunction has now been struck down in Tobisawa’s ruling. Tobisawa pointed to the section of Japan’s civil law code that states that “legal action contrary to public order and morality are invalid” and deemed that the rights to Aiuchi’s stage name being held indefinitely by the talent agency, even when the performer is no longer under contract or receiving compensation, were such a violation.
“I am very happy to be able to proudly perform as Rina Aiuchi,” the singer said following the verdict, so hopefully this will be her last renaming.
Source: Kyodo via Yahoo! Japan News via Otakomu, Asahi Shimbun Digital
Top image: Pakutaso (edited by SoraNews24)
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
Follow Casey on Twitter, where he still remembers having to pay import prices to buy Rina Aiuchi’s “Navy Blue” in California.

Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 2]
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Japan’s craziest burger chain takes menchi katsu to new extreme levels
Japanese restaurant chain serves Dragon Ball donuts and Senzu Beans this spring
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 2]
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Japan’s craziest burger chain takes menchi katsu to new extreme levels
Japanese restaurant chain serves Dragon Ball donuts and Senzu Beans this spring
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
Drift ice in Japan is a disappearing winter miracle you need to see now
Nephew receives SD card after his uncle passes away, finds treasure trove of gems from the past
Does this video about an abandoned dog leave you wiping your eyes or shaking your fist?
Sega’s been hiding a snarky message on its arcade bags for two years but no one noticed until now
Nakano Broadway sells a fukubukuro lucky bag for foreigners, but is it a good deal or a scam?
Highest Starbucks in Japan set to open this spring in the Tokyo sky
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Tokyo Skytree turns pink for the cherry blossom season
Yakuzen ramen restaurant in Tokyo is very different to a yakuza ramen restaurant
Shibuya Station’s Hachiko Gate and Yamanote Line stairway locations change next month
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Starbucks Japan adds new sakura Frappuccino and cherry blossom drinks to the menu
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 1]
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
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Naruto and Converse team up for new line of shinobi sneakers[Photos]
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
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】
No more using real katana for tourism activities, Japan’s National Police Agency says
Drift ice in Japan is a disappearing winter miracle you need to see now
Nephew receives SD card after his uncle passes away, finds treasure trove of gems from the past
Does this video about an abandoned dog leave you wiping your eyes or shaking your fist?
Sega’s been hiding a snarky message on its arcade bags for two years but no one noticed until now
Nakano Broadway sells a fukubukuro lucky bag for foreigners, but is it a good deal or a scam?
Tokyo street sweets: The must-snack treats of Nakano’s Refutei
Parasite movie releases free official wallpapers to download as backgrounds for video calls
Tokyo travel hack: How to enjoy a free sightseeing boat tour around Tokyo Bay
Giant hotel rooms in Osaka reflect the new non-niche face of travel in Japan.
W.T.F. Japan: Top 5 strangest kanji ever 【Weird Top Five】
Japanese drugstore sells onigiri at pre-stupid era prices, but how do they compare to 7-Eleven?