Training is good for your health, but not for your jealousy XD
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Also, here's a comparison between how the anime portrays the Taishou era, and a couple of real pictures of that period:
1.
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2.
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Finally, the whole TaYaMu seiyuu main cast wearing yukatas:
Back Row (left to right) : Kaida Yuko (Tomoe), Mamiko Noto (Yuki), Hirohashi Ryou (Tama), Goto Saori (Kochou), Nakahara Mai (Akiko).
Front Row (l r): Ueda Kana (Noe), Makino Yui (Kyouko), Itou Kanae (Koume), Kitamura Eri (Shizuka).