A head of bosozoku group Dragon slashed a fellow member with a Chinese sword in May
TokyoReporter
Yamaguchi-gumi member demanded total of ¥50,000 for April and May
Police arrested Ryoma Sumida for the stabbing death of Yuki Kojima
Junpei Yasuda last updated his Twitter account on June 20
The suspect claimed to suffering from pain in his arm and lower back
A search of the suspect's residence revealed about 300 articles of women's clothing
The suspect: 'Since March, I've targeted young girls on more than 20 occasions'
The shops sold packets containing approximately 3 grams of the illegal substances for 7,000 yen
The suspect has been charged with public indecency for exposing himself to a female employee