Though not yet arrested, he admitted to the cops that he "... liked girls between the ages of upper elementary school students to about the second year of junior high", making the age range to around 10-14 years of age. The current Japanese law in regards to possession of child pornography materials has a penalty of up to one year imprisonment or a fine or one million yen (around US$8,900).
Finally, as for the fate of Watsuki's other properties, it is yet to be determined. Daily Sports previously reported that there were plans for more live-action Rurouni Kenshin films in the future. It is unknown if Warner Bros. Japan will shelve said plans because of this report.
[Source: SoraNews24, Anime News Network]