Kawasaki Frontale striker Yu Kobayashi, who has pulled out of Japan's friendlies against Honduras and Australia with a left-knee injury, will be out of action for three to four weeks, the J. League club said Thursday.

Kobayashi, who made his international debut in last month's 1-0 home win over Jamaica, suffered the injury during training with Japan on Tuesday.

Vissel Kobe's Ryota Morioka was called up to replace Kobayashi.

Japan hosts Honduras in Toyota, Aichi Prefecture on Friday before taking on Australia in Osaka next Tuesday.