In 1987, Moriuchi won his first professional shogi tournament when he defeated 2 games to none to win the 18th
Shinjin-Ō, but was unable to repeat as champion the following year when he lost the 19th Shinjin-Ō to Habu 2 games to none in the first match between the two as professionals. Moriuchi would, however, win the tournament again in 1991 (against
Taku Morishita, 20) and 1993 (against
Yasumitsu Satō, 21). In 1988, Moriuchi defeated then
Meijin Kōji Tanigawa 2 games to 1 to win the 7th . The victory was much discussed through the year in professional shogi circles because Moriuchi ranked 4-dan at the time had defeated the reigning Meijin in a match. Moriuchi's first appearance in a major title match was the 54th Meijin Match in June 1996. Moriuchi was promoted to the
Class A League for the first time in 1995 and went on to win the league in his first season with a 72 record to advance to the title match against Habu. Although both players were the same age and had been rivals since elementary school, Habu was much more establish as a professional and was also a 7-crown title holder (i.e., simultaneously held all seven major titles) at the time. Moriuchi ended up losing the matchi 41. Moriuchi became the fifteenth shogi professional to win 800 official games when he defeated
Yoshiharu Habu in Game 2 of 69th Meijin title match on April 21, 2011. In March 2017, Moriuchi voluntarily declared himself as a
free class player, thus leaving the Meijin tournament league. On February 20, 2025, Moriuchi became the eleventh professional to win 1000 official games. The announced that next day that Moriuchi would receive the "Special Shogi Honor Award" for this achievement. His career record at the time of the victory was 1000 wins and 636 losses for a winning percentage of 0.611. On December 7, 2025, Moriuchi defeated to win the 3rd ; it was his first time winning the tournament and his first tournament championship in ten years.
Playing style Moriuchi is considered an all-around player proficient at both Static Rook and Ranging Rook strategies. Although he's widely known as defensively strong player, his style often called "iron-clad" or "steel defense"; in the opinion of shogi professionals
Hirotaka Nozuki and
Akihito Hirose, however, his most characteristic trait is his ability to switch from defense to attack. His so-called "strong" style is often contrasted with the "gentle" one of
Yoshiharu Habu. Moriuchi is also well known for the Moriuchi
Fortress variation which is characterized by pushing the pawn at the ninth file with P. 9d instead of the traditional P-8e, followed then by a knight jump to 9-c and then 8e.
Promotion history The
promotion history for Moriuchi is as follows: • 6-
kyū: 1982 • 1-dan: 1985 • 4-dan: May 13, 1987 • 5-dan: June 2, 1990 • 6-dan: April 1, 1992 • 7-dan: April 1, 1994 • 8-dan: April 1, 1995 • 9-dan: May 17, 2002
Titles and other championships Moriuchi has appeared in major title matches a total of 25 times. He has won the
Meijin title eight times, thus qualifying for the
Lifetime Meijin title. He has also won the
Ryūō title twice, and the
Kiō and the
Ōshō titles once each. In addition to major titles, Moriuchi has won fourteen other shogi championships during his career.
Major titles Other championships Note: Tournaments marked with an asterisk (*) are no longer held.
Awards and honors Moriuchi has received a number of awards and honors throughout his career for his accomplishments both on an off the shogi board. These include awards given out annually by the JSA for performance in official games as well as other JSA awards for career accomplishments, and awards received from governmental organizations, etc. for contributions made to Japanese society.
Annual Shogi Awards • 16th Annual Awards (April 1988March 1989): Best New Player • 19th Annual Awards (April 1991March 1992): Best Winning Percentage, Most Games Won, Most Games Played, Distinguished Service Award • 21st Annual Awards (April 1993March 1994): Technique Award • 24th Annual Awards (April 1996March 1997): Technique Award • 29th Annual Awards (April 2001March 2002): Fighting-spirit Award • 30th Annual Awards (April 2002March 2003): Technique Award • 31st Annual Awards (April 2003March 2004): Player of the Year, Most Games Won, Most Games Played • 33rd Annual Awards (April 2005March 2006): Excellent Player • 38th Annual Awards (April 2010March 2011): Game of the Year Special Prize • 41st Annual Awards (April 2013March 2014): Player of the Year
Other awards • 2004: Shogi Honor Award (Awarded by the JSA in recognition of winning 600 official games as a professional) • 2011: Shogi Honor Fighting-spirit Award (Awarded by JSA in recognition of winning 800 official games as a professional) • 2012: 25 Years Service Award (Awarded by the JSA in recognition of being an active professional for twenty-five years) • 2017:
Medal with Purple Ribbon: (Awarded by the
Government of Japan to individuals who have done meritorious deeds or have achieved excellence in their profession)
Year-end shogi prize money and game fee ranking Moriuchi has finished in the "Top 10" of the JSA's twenty-one times since 1993, and in the "Top 3" nine of those times. • Note: All amounts are given in
Japanese yen and include prize money and fees earned from official tournaments and games held from January 1 to December 31. ==JSA director==