Muramatsu played in nine Players Championship events in 2016, but did not win a match in any of them. He was knocked out in the semi-finals of the Japan Open. He partnered Keita Ono at the World Cup for the first time and they lost 5–2 to Northern Ireland in the opening round. Muramatsu was eliminated at the same stage a year later with new partner Yuki Yamada after losing 5–3 to Spain.