The Yakumo (やくも) is a limited express train service in Japan operated by West Japan Railway Company (JR West), which runs from Okayama to Yonago, Matsue and Izumo in Shimane Prefecture.

This limited express train connects Okayama with Yonago in 2 hours, Okayama with Matsue in 2 hours and 30 minutes, and Okayama with Izumoshi in 3 hours.

It stops at Okayama, Kurashiki, Sōja, Bitchū-Takahashi, Niimi, Shōyama, Yonago, Yasugi, Matsue, Tamatsukuri-Onsen, Shinji, and Izumoshi.

Services are formed as shown below:[1] The Yakumo service was first introduced on 22 September 1959, as a semi-express service operating between Yonago and Hakata in Kyushu.

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