RGG Studio
Japanese video game developer
Sega CS R&D Dept. No. 1, doing business as RGG Studio (formerly known as Ryu Ga Gotoku Studio), is a Japanese video game developer and a division of Sega. It is known for developing the games in the Like a Dragon series, which the studio is named after since Yakuza 5, and the Super Monkey Ball series.
The studio's origins can be traced back to Sega AM11 in 1998, which was renamed to R&D4 or AM4 in 1999. It was headed by Toshihiro Nagoshi, who joined Sega AM2 in 1989 and has been credited as the creator of the arcade games Daytona USA and Virtua Striker. Although Virtua Striker is attributed to another developer, Satoshi Mifune. Nagoshi requested his own development division during the development of Shenmue.
In 2000, AM4 was re-established as Amusement Vision, where it was best known for Super Monkey Ball and F-Zero GX. Several structural changes occurred in the years that followed. During a reorganization in 2003, the non-sports staff of Smilebit merged with Amusement Vision, and a year later Sega merged with Sammy to form Sega Sammy Holdings.
“RGG Studio” enters the record as japanese video game developer. Crown Archives preserves that source wording while asking what Studio, Japanese and video can confirm, complicate or overturn.
Why this record matters
“RGG Studio” is worth following because a concise public description often conceals a longer documentary argument. Here, Studio, Japanese and video provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q18415238. 1 of 4 selected statements include explicit references; 3 carry qualifiers and 0 use preferred rank. The first chronological checks are 1998, 1999, 1989 and 2000.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “RGG Studio”, its source revision and the description used here.
- Expand the search: follow RGG Studio primary sources, RGG Studio archive and Studio research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “RGG Studio”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “RGG Studio” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.