• LONG TIME NO SEE -Self Cover of BoA's Song- - BoA・Natsumi Watanabe - 2009-03-11
• LOVE LETTER - BoA・Natsumi Watanabe - 2007-09-26
• Everlasting - BoA・Natsumi Watanabe - 2006-01-18
• LOVE & HONESTY - BoA・Natsumi Watanabe - 2004-01-15
• MOON & SUNRISE - BoA・Natsumi Watanabe - 2003-01-29
• Nothing’s gonna change - BoA・Natsumi Watanabe - 2002-03-13