is a South African-born Japanese video game developer, illustrator, and composer. He is best known for creating the 2D fighting game series Guilty Gear. He designed the characters, storyline, and wrote the music. He also voiced the protagonist, Sol Badguy, until 2007.

Ishiwatari has worked on several other games for Arc System Works, such as Blazblue as a composer and illustrator, and Battle Fantasia as a voice actor for the character Freed Velez.

Ishiwatari is a metal and rock composer. He's collaborated with other musicians such as Jason Charles Miller, Shin Hae-chul, , Naoki Hashimoto, and .

He is also the Chief Creative Officer of Arc System Works.

Career

1995-1998: Guilty Gear (1998)

Ishiwatari studied at , and got a part-job at Arc System Works in 1995 after only a year into his courses. He conceived of the idea for Guilty Gear while he was still in vocational school. During his part-time work before graduating, he would serve as a playtester for various Super Famicom games, including the first fighting game he would work on, Bishōjo Senshi Sailor Moon S: Jōgai Rantō!? Shuyaku Sōdatsusen. One day, he told Arc System Works founder and president, Minoru Kidooka, that he wanted to make a game similar to Street Fighter. Development did not start immediately, as the team was small and had little experience making video games. Once the team had enough resources to begin development, the project took about a year and a half to complete; releasing as Guilty Gear for the PlayStation 1 in 1998.

Ishiwatari had intended for the game's protagonist, Sol Badguy, to be voiced by Koichi Yamadera. However, they were unable to get him onboard, so Ishiwatari decided to voice the character himself; a choice that he admits felt impudent. In the same vein, lead programmer, Hideyuki Anbe, would voice Potemkin. Ishiwatari had no instrumental skills. In order to compose the music for the title, he used music editor in the Famicom game to make MIDIs that he would send over to the game's sound team. For illustrations, Ishiwatari found himself taking inspiration from the artwork for various Capcom titles.

The game received generally positive reception from critics, and as the project was made up of a very small team; it sold well enough to be considered a success.

1999-2006: Guilty Gear follow-ups

A new Guilty Gear game for arcade hardware was commissioned by publisher Sammy Studios in February 1999. With Ishiwatari still at the helm, the title would release as Guilty Gear X in June 2000. X was seen as a great continuation from the original title, and would receive praise for its characters, graphics, and soundtrack.

Following the success of the Guilty Gear X, the series would receive many ports, updated versions, and spin-off titles. Some of these titles included: the Wonderswan handheld titles, Guilty Gear Petit and Guilty Gear Petit 2, directed by Emiko Iwasaki, and the expanded sequel to X, Guilty Gear XX.

Ishiwatari would continue to direct and compose music for the series. Three albums using the music from Guilty Gear X would be released featuring added vocals by Japanese band, . Jason Charles Miller would do two albums covering the soundtrack to Guilty Gear XX with vocals. For the South Korean release of the updated version of XX, Guilty Gear X2#Reload, the game would include a brand new, exclusive soundtrack composed by Ishiwatari and Korean musician, Shin Hae-chul.

Ishiwatari would state for his illustrations that he prefers using analog materials, such as Copic markers, over making art digitally.

2007-2010: Guilty Gear 2: Overture and BlazBlue

In 2004, Sammy Studios would merge with SEGA. As such, rights of characters introduced in Guilty Gear X or Guilty Gear XX were owned by Sega Sammy Holdings. Due to this, and inspiration that Ishiwatari had received from playing more games from European and American developers, such as First Person Shooters and Real Time Strategy games, he and his team decided to make a Guilty Gear title that was not a fighting game. Guilty Gear 2: Overture would release in November 2007 in Japan for the Xbox 360. Media outlets would liken the title to MOBA and RTS games. Several outlets compared it directly to the Dynasty Warriors series. Ishiwatari said a goal for the title was to find ways for the fun, combo-filled nature of fighting games to enter a new genre. Characters from the original 1998 Guilty Gear appeared, but later additions such as Faust, Dizzy and Bridget were excluded due to rights issues. Arc System Works was hopeful about making future games, whether fighting games or other, with the excluded characters. Ishiwatari would also stop voicing series protagonist, Sol Badguy, in this title in favor of Jouji Nakata. Overture would receive more mixed reception critically than previous titles.

At the same time, a new fighting game series was also in development at Arc System Works, BlazBlue, and would release its first game, BlazBlue: Calamity Trigger, in November 2008. Ishiwatari would also compose the music for this series.

2011-2017: Guilty Gear Xrd

In 2011, Arc System Works would fully purchase the rights of Guilty Gear from Sega Sammy Holdings. Now no longer concerned with rights issues, a new Guilty Gear fighting game would enter production the Spring of the same year under the name Guilty Gear Xrd. Ishiwatari would return as the project's director as part the newly-formed "Team Red" development team in Arc System Works. In tandem with Xrd, Arc System Works would also produce a pachislot gambling game, Guilty Gear Vastedge XT, which would release in 2013. Ishiwatari would also compose the music for this title, and it would mark the first time Ishiwatari would work alongside Naoki Hashimoto of the band Outrage, who would return for several tracks in Xrd.

Guilty Gear Xrd would release in 2014, and receive critical praise for its gameplay, music and artwork/graphics. Xrd boasted a cel-shaded art-style that aimed to recreate the look of a 2D, hand-drawn anime, despite using 3D models in Unreal Engine 3. Ishiwatari stated that after they had reached the "pinnacle" of 2D sprite-work in BlazBlue, the next step in that graphical evolution was 3D graphics that looked like the hand-drawn pixel art. He explained that he and his the team had experimented with 3D visuals, particularly during development of -Overture-, but found the common "photo realism" approach with modeling limiting for the purposes of fighting games. The lighting systems of Xrd were made with "a complete lack of physical accuracy" in order to make the new graphics match as closely to cel animation as possible. Ishiwatari would state that a particularly strong benefit of the new graphic system was how the face could be animated independently from the rest of the body, allowing for many more facial expressions to communicate emotion without dialogue.

Xrd would receive multiple updated releases, ending with Guilty Gear Xrd Rev 2 in March 2017.

2018-Present: Guilty Gear Strive and new projects

A new Guilty Gear title was revealed to be in development by Arc System Works at Evo 2018. The following year at Evo 2019, a proper announcement trailer was shown off revealing gameplay and that the title would use Unreal Engine 4. Later that same year, the game would be given a proper title, Guilty Gear Strive. Ishiwatari explained that this title's focus was to allow for Guilty Gear to be enjoyed by a wider range of players, while still maintaining the essence of the series. He elaborated that he aimed for past titles to be like shogi, where if a difference in skill meant the better player would almost always win. The new title would instead aim to be closer to mahjong, where opportunities could be seized by taking aggressive actions and making accurate predictions. Ishiwatari also stated that the overall theme for the series is "what does it mean to be human?"

The title's development would be impacted by the COVID-19 pandemic. The game was delayed to 2021, and would utilize rollback netcode to allow for easier online gameplay for players over longer distances.

Ishiwatari, once again composing music for the title, would decide to give each character their own vocal theme. Naoki Hashimoto would once again return, alongside new vocalists , and Molly Daisy Scarpine.

After it's release in June 2021, Guilty Gear Strive would quickly become the most successful game in the franchise. Receiving praise from critics and winning several awards. As of June 2026, Strive had sold over 4 million copies.

After the success of Guilty Gear Strive, and now as the Chief Creative Officer of Arc System Works, Ishiwatari wanted to make sure that younger developers were still able to experiment with new, fresh ideas. Ishiwatari would direct his first new IP in over 25 years with the 2026 title, Damon and Baby. Ishiwatari's hope with the title was to teach the younger staff members how to make games in different genres, stating "It’s very dangerous to spend decades doing highly specialized work, only to realize later that you’re no longer capable of doing anything else."

Influences and philosophy

Ishiwatari first started listening to Western music at a young age after his elementary school used Queen's "Don't Stop Me Now" for an assembly. His first album he picked up was Whitesnake's self-titled album. Ishiwatari believes Queen will always be his favorite band, but has said that he tries to listen to everything. Some of his favorite artists in 2001 included The Beatles, Slayer, and Ringo Sheena; the latter two would go on to inspire his characters of Slayer and I-No.

Ishiwatari has cited the manga Bastard! by Kazushi Hagiwara as an inspiration for character's designs and fashion. Bastard! is known for naming various characters, locations, and key objects after rock and heavy metal musicians, a trait that Ishiwatari would borrow into Guilty Gear. Protagonist, Sol Badguy, takes heavy inspiration from Queen lead-singer, Freddie Mercury, and takes his name from one of Mercury's alias of "Mr. Badguy." Ky Kiske takes his name from Helloween band members, Kai Hansen and Michael Kiske. Character Axl Low takes his name from lead singer of Guns n' Roses, Axl Rose. Character Zato-1's shadow companion, Eddie, is named after Eddie, the mascot for Iron Maiden. Character Millia Rage takes her surname from German metal band, Rage.

Ishiwatari has stated that after Guilty Gear X, he says he realized that fighting games were not only action games, but logic games. He changed his philosophy going forward to only start designing a character after their role has been determined. He's stated that he doesn't fully explore a character's story in the work itself, but tries to make each character have a thematic identity, and have a clear intent on how that should be introduced and concluded. Ishiwatari cited manga Kinnikuman as an inspiration to give every character an immediately identifiable silhouette.

Guilty Gear Strive director, Akira Katano, has said that Ishiwatari is always prepared for any past character of his to return at any time, citing how Testament was designed for Guilty Gear Xrd, despite not making any appearance in the final game. Art director, Hidehiko Sakamura, recounted that during development of Guilty Gear Strive, he was working on a character concept that would eventually become Goldlewis Dickinson. However, he was unsatisfied with the concept of a large, intimidating American Secretary of Defense who fought by swinging a ballistic missile. Sakamura thought his concept was too absurd to work, and he asked Ishiwatari to redesign the character. Ishiwatari returned by changing the weapon to an "even more absurd" idea of a coffin from Area 51 with a live alien extraterrestrial inside.

Personal life

Ishiwatari was born in Johannesburg, South Africa, and raised in Japan.

In December 2025, Ishiwatari stated that his child had beaten The Legend of Zelda: Breath of the Wild, and that he was proud that they beat the game before he had himself.

Works

Ludography

Discography

Note: This list does not include album releases of Ishiwatari's video game soundtracks with no meaningful differences from their in-game counterparts.

References

External links

• Game credits at MobyGames

• Artist profile at OverClocked ReMix