2018 Shimadzu All Japan Indoor Tennis Championships – Doubles

Sanchai and Sonchat Ratiwatana were the defending champions but lost in the first round to Gong Maoxin and Hsieh Cheng-peng.

Luke Saville and Jordan Thompson won the title after defeating Go Soeda and Yasutaka Uchiyama 6–3, 5–7, [10–6] in the final.

Seeds
• # 🇹🇭 Sanchai Ratiwatana / 🇹🇭 Sonchat Ratiwatana (first round)

• # 🇮🇳 Jeevan Nedunchezhiyan / Christopher Rungkat (first round)

• # 🇦🇺 Luke Saville / 🇦🇺 Jordan Thompson (champions)

• # Peng Hsien-yin / 🇸🇪 Andreas Siljeström (first round)