I'm trawling old Japanese newspapers for Sega info from the 90s. What a gold mine of untapped info this is.
I came across this article from the March 16, 1998 issue of the Nikkei Shinbun titled "Sega plunges into the red without anyone taking blame". It features quotes from then-Sega president Shoichiro Irimajiri, as well as other unnamed Sega executives, and I trust the info given. This comes after Nakayama was ousted from power.
Here is a juicy excerpt:
Based on other articles, Irimajiri heavily implies that Sega of America was mismanaged under Kalinske and Nakayama (Irimajiri, I should point out, took over as president of SOA in 1996 after Kalinske and Nakayama resigned). Although SOA claimed 50% of the market by 1994, it apparently came at a great cost via excessive promotions with little focus on profits. Furthermore, SOA completely failed to manage inventory well and ended up with millions upon millions of unsold consoles and games filling warehouses. Essentially, although the Sega parent company was posting profits through 1997, SOA had been tying up / bleeding money like crazy, something that didn't easily show up in annual reports. When Irimajiri took over the company, he was forced to write off all of this unsold inventory and heavily write down the value of SOA, which is what finally caused Sega to post a loss in 1998.During the first half of the 1990s, Sega was victorious in capturing 50% of the North American market with its 16-bit game console the Genesis. If Sega had fully committed to the Saturn with that kind of force, the outcome probably would have been different. However, just before the release of the Saturn, Sega released the 32X, an add-on that just increased the capabilities of the Genesis. The intention was to boost profits from the Genesis install base, but the result was a disaster. Among software developers, “there was a rapid spread of distrust for Sega” (Irimajiri). The Saturn was released under these negative conditions.
The 32X was handled by Sega’s North American subsidiary [SOA], whose president had managed to persuade Nakayama to let him sell the add-on. However, soon after, that president was allowed to resign at his own convenience without being called on to take blame for the failure. Nakayama is famous for his management style of “sure punishment or reward,” but his sharp intuition for the arcade industry failed him when it came to the home console industry, where he lacked experience. Because of that, he allowed some executives to run solo.
Irimajiri didn't exactly seem to get along with Nakayama. Irimajiri was vocally critical of Nakayama's continued push to sell the Saturn, and they really butted heads over the design of the Dreamcast.
People tend to assume the conflict at Sega was between Nakayama and Kalinske. I've never seen any indication of that. This and other things I'm reading, however, do indicate Nakayama received a lot of internal criticism for how he handled SOA. Everything I've read has shown that Nakayama was a strong supporter of Kalinske and Joe Miller, but the freedom he gave them with the 32X was seen as a deadly mistake for the company.
There is so much more to the narrative of the 32X and the Saturn that has yet to be told.