Accommodation booking websites such as Airbnb are still listing 5,000 or so suspected illegal “minpaku” private lodgings, despite new legislation that came into force four months ago, the Japan Tourism Agency said Oct. 10.

The JTA, an arm of the tourism ministry, arrived at the figure based on its own research. Those thought to be illegal accounted for 20 percent of all minpaku listings checked.

The eight websites concerned are all run by intermediate agents based overseas, including China’s Tujia and Zizaike, as well as U.S.-based Airbnb Inc.

The JTA instructed operators of the websites hosting the ads to delete them in order to comply with the new law regulating minpaku operations that took effect on June 15.

The snapshot inspection of a single day looked at 24,938 facilities advertised by 37 brokers.

Local governments were requested to check the legality of all the listings within their areas, and it was discovered at least 4,916 facilities were using bogus registration numbers and false addresses.

The JTA has requested the intermediate agents to submit details of all the facilities posted on their sites every six months, and has asked them to report the situation as of Sept. 30 by no later than Oct. 15.

A JTA official said, “If the latest inspection results show that the situation has not improved, we will need to consider conducting a further investigation.”