Muramatsu entered PDC Qualifying School and was knocked out in the last 16 on two of four days which helped him finish inside the top 18 on the Order of Merit who earn two-year PDC tour cards. After whitewashing China 5–0, Muramatsu and Hashimoto were knocked out of the World Cup in the second round for the second year in a row this time to the top seeds England. Muramatsu competed in the inaugural Japan Darts Masters and was eliminated 6–1 by Peter Wright in the opening round. 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.