Sankei Shimbun has an article about the increase of crimes committed by foreigners in Japan, including tourists, that focuses particularly on the Vietnamese.
Sankei Shimbun graphic shows number of foreigners (in blue) and Vietnamese (in orange) arrested in Japan from 2014 to 2023
From the article:
According to statistics from the National Police Agency, of the 5,735 foreigners arrested in 2015, the top nationality was Vietnamese, with 1,608. They accounted for just under 30%, far ahead of the second-placed Chinese (1,231).
An immigration official explained, “Vietnam’s political stability has led to an influx of foreign capital, which has boosted the economy. There is no end to overseas travelers.”
A typical method is large-scale shoplifting, targeting clothing from fast fashion chains, cosmetics from drugstore chains, and medicines. Taking advantage of the growing travel craze due to the Japanese food boom, hit-and-run thieves who travel from Vietnam to shoplift and then immediately return to their home countries are said to be stepping up their activities.
Vietnamese people living in Japan have also seen their foreign currency-denominated income drop due to the sudden drop in the value of the yen. There has been an increase in the number of people joining “anonymous, mobile crime groups” that commit robbery and theft through illegal part-time work advertised on Vietnamese communities on social networking sites.
A person involved in the investigation said, “There is no denying the fact that the boom in Japanese food and the historic depreciation of the yen are rapidly increasing Vietnamese organized crime.”