I got a lot of summer festival videos online at YouTube, especially awa odori:

Koenji Awa Odori 2009 1/3
Koenji Awa Odori 2009 2/3
Koenji Awa Odori 2009 3/3
Minami-Koshigaya Awa Odori 1/2
Minami-Koshigaya Awa Odori 2/2
Aoishin-ren at Minami-Koshigaya Awa Odori
Mitaka Awa Odori 1/2
Mitaka Awa Odori 2/2
Nakamurabashi Awa Odori 1/5
Nakamurabashi Awa Odori 2/5
Nakamurabashi Awa Odori 3/5
Nakamurabashi Awa Odori 4/5
Nakamurabashi Awa Odori 5/5
Kita-Urawa Awa Odori 1/3
Kita-Urawa Awa Odori 2/3
Kita-Urawa Awa Odori 3/3
Otsuka Awa Odori, Tokyo
Matsuri Tsukuba and Nebuta Parade
Sendai Tanabata Matsuri 2009 1/3
Sendai Tanabata Matsuri 2009 2/3
Sendai Tanabata Matsuri 2009 3/3
Yamagata Hanagasa Matsuri 2009
Fukushima Waraji Matsuri 1/2
Fukushima Waraji Matsuri 2/2
Asakusa Samba Carnival 2009
Hachioji Matsuri, Tokyo
Yokohama Port Opening Expo
Kanko Maru Yokohama cruise
Yokota Air Base Japanese-American Friendship Festival 2009
Fussa Tanabata Star Festival
Asagaya Tanabata Matsuri

Here are the photos:
Koenji Awa Odori 2009
Minami-Koshigaya Awa Odori
Mitaka Awa Odori
Kita-Urawa Awa Odori, Saitama
Nakamurabashi Awa Odori 2009, Nerima
Otsuka Awa Odori, Tokyo
Matsuri Tsukuba and Nebuta Parade
Kaminoyama Castle, Yamagata
Yokota Air Base Japanese-American Friendship Festival 2009
Fussa Tanabata Star Festival
Asagaya Tanabata Matsuri
Fukushima Tanabata
Hachioji Matsuri, Tokyo
EXPO Y150: Yokohama Port Opening 150th
Edogawa Fireworks