Another user left bags in a rental car when he could not find a coin locker in a railway station and needed somewhere to leave his luggage.
One harassed man said he hired a car so he could sit and eat his packed lunch in peace as he could not find anywhere else to sit.
Most of the non-driving car users said they chose to hire a vehicle because they were comfortable and cheap — a mere ¥400 ($5.50) for 30 minutes — and available 24 hours a day, while even small railway stations now have unmanned rental car parking areas where anyone can reserve and pay for a vehicle through their mobile phone.
A similar study by NTT Docomo, which also operates a car hire service, found that while most people who did not drive the vehicle anywhere were using the space for a nap, others also wanted to use them as a place to meet friends for a chat or as a quiet place to watch television.
More one-off reasons included to get changed to attend a Halloween party, to practise karaoke, for an English-language class and even to do facial stretches in private, NTT said.