TOKYO -- A Danish man has been arrested on suspicion of spraying graffiti on the side of a train carriage here on April 24, the Metropolitan Police Department (MPD) announced on April 30.

Part-time worker Frederik Emil Palmberg, 21, from Denmark, is specifically accused of trespassing and damage to property. Commenting on the allegations, Palmberg apparently told investigators, "I wanted to leave a memory of my visit to Japan."

Palmberg allegedly broke into Myogadani Station on Tokyo Metro's Marunouchi Line after it had ended operations for the day sometime between around 12:40 a.m. and 4:50 a.m. He then is suspected of spraying graffiti on the side of a train car.

According to police, black and green paint was sprayed on a carriage over an area measuring about 1.3 meters by 4.5 meters with letters resembling the spelling of his name and heart-shaped marks and the figure "18" in possible reference to the year 2018.

Police identified Palmberg from evidence such as security camera footage while he was staying in Japan for the first time from April 10, and arrested him on April 29 at Tokyo International Airport as he was about to leave Japan.

(Japanese original by Kazuhiro Toyama, City News Department)