Year | Competition | Date | Venue and location | Surface | Opponent | Score | Result |
2002 | Group I, Asia/Oceania, 1st Round | 8–10 February 2002 | Gunsan, South Korea | Carpet, Indoor | South Korea | 3–2 | Won |
Group I, Asia/Oceania, 2nd Round | 5–7 April 2002 | Muang-Thong-Thani Complex, Bangkok, Thailand | Hard, Outdoor | Thailand | 1–4 | Loss |
2003 | Group I, Asia/Oceania, 1st Round | 7–9 February 2003 | R.K. Khanna Tennis Stadium, New Delhi, India | Grass (Grass), Outdoor | India | 1–4 | Loss |
Group I, Asia/Oceania, 1st Round Relegation Play-offs | 4–6 April 2003 | Toyota City Gymnasium, Toyota, Aichi, Japan | Carpet, Indoor | Pakistan | 5–0 | Won |
2004 | Group I, Asia/Oceania, 1st Round | 6–8 February 2004 | Gelora Bung Karno Tennis Stadium, Jakarta, Indonesia | Hard, Outdoor | Indonesia | 3–2 | Won |
Group I, Asia/Oceania, 2nd Round | 9–11 April 2004 | Utsubo Tennis Center, Osaka, Japan | Hard, Outdoor | India | 3–2 | Won |
2004 Davis Cup World Group play-offs | 24–26 September 2004 | Club Naval de Campo Las Salinas, Viña del Mar, Chile | Clay, Outdoor | Chile | 0–5 | Loss |
2005 | Group I, Asia/Oceania, 1st Round | 4–6 March 2005 | Soleada Club, Taoyuan, Taiwan | Hard (rebound ace), outdoor | Chinese Taipei | 2–3 | Loss |
Group I, Asia/Oceania, 1st Round Relegation Play-offs | 15–17 July 2005 | Namihaya Dome, Kadoma, Osaka, Japan | Carpet (Taraflex), Indoor | Thailand | 4–1 | Won |
2006 | Group I, Asia/Oceania, 1st Round | 10–12 February 2006 | Namihaya Dome, Kadoma, Osaka, Japan | Carpet (Taraflex), Indoor | China | 5–0 | Won |
Group I, Asia/Oceania, Semifinals | 7–9 April 2006 | Rama Gardens Hotel, Bangkok, Thailand | Hard (Plexipave), Outdoor | Thailand | 2–3 | Loss |
2007 | Group I, Asia/Oceania, 1st Round | 9–11 February 2007 | Beijing International Tennis Center, Beijing, China | Hard (rebound ace), indoor | China | 4–1 | Won |
Group I, Asia/Oceania, Semifinals | 6–8 April 2007 | Namihaya Dome, Kadoma, Osaka, Japan | Carpet (Taraflex), Indoor | Thailand | 5–0 | Won |
World Group, play-offs | 21–23 September 2007 | Namihaya Dome, Kadoma, Osaka, Japan | Carpet (Taraflex), Indoor | Romania | 2–3 | Loss |
2008 | Group I, Asia/Oceania, 1st Round | 8–10 February 2008 | Rizal Memorial Tennis Center, Manila, Philippines | Hard (Truflex Acrylic), Outdoor | Philippines | 5–0 | Won |
Group I, Asia/Oceania, Semifinals | 11–13 April 2008 | R.K. Khanna Tennis Stadium, New Delhi, India | Grass (Grass), Outdoor | India | 2–3 | Loss |
2009 | Group I, Asia/Oceania, 1st Round | 6–8 March 2009 | Namihaya Dome, Kadoma, Osaka, Japan | Carpet (Taraflex), Indoor | China | 5–0 | Won |
Group I, Asia/Oceania, Semifinals | 8–10 May 2009 | Sport Complex Pahlavon, Namangan, Uzbekistan | Clay, Indoor | Uzbekistan | 2–3 | Loss |
2010 | Group I, Asia/Oceania, 1st Round | 5–7 March 2010 | Namihaya Dome, Kadoma, Osaka, Japan | Carpet (Taraflex), Indoor | Philippines | 5–0 | Won |
Group I, Asia/Oceania, Semifinals | 7–9 May 2010 | Queensland Tennis Centre, Brisbane, Australia | Clay, Outdoor | Australia | 0–5 | Loss |
2011 | Group I, Asia/Oceania, 1st Round | 4–6 March 2011 | Plantation Bay Resort & Spa, Lapu-Lapu City, Philippines | Clay, Outdoor | Philippines | 3–1 | Won |
Group I, Asia/Oceania, Semifinals | 8–10 July 2011 | Bourbon Beans Dome, Miki, Hyogo, Japan | Hard (Acrylic), Indoor | Uzbekistan | 4–1 | Won |
World Group, play-offs | 16–18 September 2011 | Ariake Coliseum, Tokyo, Japan | Hard (Deco Turf II), Outdoor | India | 4–1 | Won |
2012 | World Group, 1st Round | 10–12 February 2012 | Bourbon Beans Dome, Miki, Hyogo, Japan | Hard (DecoTurf), Indoor | Croatia | 2–3 | Loss |
World Group, play-offs | 14–16 September 2012 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Outdoor | Israel | 2–3 | Loss |
2013 | Group I, Asia/Oceania, 1st Round | 1–3 February 2013 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Indoor | Indonesia | 5–0 | Won |
Group I, Asia/Oceania, Semifinals | 5–7 April 2013 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Indoor | South Korea | 3–2 | Won |
World Group, play-offs | 13–15 September 2013 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Indoor | Colombia | 3–2 | Won |
2014 | World Group, 1st Round | 31 January–2 February 2014 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Indoor | Canada | 4–1 | Won |
World Group, Quarterfinals | 4–6 April 2014 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Indoor | Czech Republic | 0–5 | Loss |
2015 | World Group, 1st Round | 6–8 March 2015 | Doug Mitchell Thunderbird Sports Centre, Vancouver, Canada | Hard (Premier), Indoor | Canada | 2–3 | Loss |
World Group, play-offs | 18–20 September 2015 | Club Campestre, Pereira, Colombia | Clay (Red Clay), Outdoor | Colombia | 3–2 | Won |
2016 | World Group, 1st Round | 4–6 March 2016 | Barclaycard Arena, Birmingham, Great Britain | Hard (GreenSet Cushion), Indoor | Great Britain | 1–3 | Loss |
World Group, play-offs | 16–18 September 2016 | Utsubo Tennis Center, Osaka, Japan | Hard, Outdoor | Ukraine | 5–0 | Won |
2017 | World Group, 1st Round | 3–5 February 2017 | Ariake Coliseum, Tokyo, Japan | Hard (DecoTurf), Indoor | France | 1–4 | Loss |
World Group, play-offs | 15–18 September 2017[a] | Utsubo Tennis Center, Osaka, Japan | Hard (DecoTurf), Outdoor | Brazil | 3–1 | Won |
2018 | World Group, 1st Round | 2–4 February 2018 | Morioka Takaya Arena, Morioka, Japan[2] | Hard (GreenSet Pro), Indoor | Italy | 1–3 | Loss |
World Group, play-offs | 14–16 September 2018 | Utsubo Tennis Center, Osaka, Japan | Hard (DecoTurf), Outdoor | Bosnia and Herzegovina | 4–0 | Won |
2019 | Davis Cup qualifying round | 1–2 February 2019 | Guangdong Olympic Tennis Centre, Guangzhou, China | Hard (TOPLUS MC Pro System), Outdoor | China | 3–2 | Won |
Finals, Round-Robin Group A | 19 November 2019 | Caja Mágica, Madrid, Spain | Hard, Indoor | France | 1–2 | Loss |
Finals, Round-Robin Group A | 20 November 2019 | Caja Mágica, Madrid, Spain | Hard, Indoor | Serbia | 0–3 | Loss |
2020–21 | Davis Cup qualifying round | 6–7 March 2020 | Bourbon Beans Dome, Miki, Japan | Hard (DecoTurf), Indoor | Ecuador | 0–3 | Loss |
Davis Cup World Group I | 5–6 March 2021 | Pakistan Sports Complex, Islamabad, Pakistan | Grass, Outdoor | Pakistan | 0–4 | Won |