As a commentary on Nintendo. I believe this is a large part of why console gaming and handheld gaming have been dominant for so long in Japan. Rather than PC gaming.
Statistics and numbers like that are a part of many reasons why I see the Nintendo as establishing the console industry. Nintendo revived the console industry in the West. While in Japan it seems like it helped simply establish itself as a market-force and tradition.
PC gaming seemed to do fairly well in Japan until the release of the Famicom. Though shifting from NEC to DOS based computers, and other factors probably didn't help the PC gaming market in comparison to the West.
I also think that Nintendo's family focus allowed it to appeal to Japanese families more than other companies. I think that Nintendo as a Kyoto based company, had some somewhat Kyoto based business philosophies. From what little I understand about Japanese culture, it seems like this translated to how they created and advertised products. It seems like that Nintendo went after censorship in America as a reflection of their "family values" in Japan. When I look back and watch old Nintendo advertisements, a lot of them were placed in traditional Japanese homes with tatami mats, and making themselves look like a simple company providing simple entertainment for families.
There were certainly other commercials, like the Zelda rap commercial and so forth. But if I'm not mistaken Nintendo had all of the right advertising. And went after and was a host of games that would appeal to Japanese families. It was, after all, called the "Famicom", which is a shortened way of saying "family computer".
It seems like the Famicom was also the first system in Japan to really appeal to Japanese families. And SEGA failed to achieve the same kind of software support, advertising, and consumer image as Nintendo. Particularly the SEGA Mega Drive or Genesis, which was mostly known for sports games, and American ones at that, and failed to get all of the most important games. Particularly games that Japanese audiences would be interested in.
It seems like Japanese game players have every bit as much nostalgia as Western game players. Retro is a thing here in America, but I'm not such that retro appeal has ever left Japan. Name brands like Dragon Quest and Mario are still very important in Japan. And out of nostalgia and habit people will still buy Dragon Quest games.
Nintendo has an advantage of having become a new tradition, of sorts. It's something that people can recall from the 80s and continue supporting. No one else from the 80s has that kind of staying power and long lasting tradition.
Also, on the matter of family appeal, a lot of the new games that are popular in Japan are also family-friendly games. Games such as Animal Crossing. There's very little violence or games rated for adults on that list. While violent, M rated games are very popular in the West, particularly in this generation where shooters have become common. That sort of game never seems to have been all that popular in Japan. And violent military games I have heard have always been more popular among otaku than normal Japanese game buyers.
I've been told than the popular violent military games that are popular here in the West, don't appeal much to Japanese people. And are only an otaku hobby. That is what I have been told and read, at least. By people who sound as if they have a lot of education on Japanese culture. While we, here, people often use the word "otaku" to describe hobbies like moe and cute video games they don't like. Cuteness seems to be pretty mainstream in Japan, they even use moe and even borderline loli content,
like this to advertise make-up, presumably to women(warning, there's an almost topless loli character in this commercial, possibly NSFW). While otaku make up all sorts of hobbies, you can like cute stuff without being an otaku, and you can also be a military game otaku. And it seems like military games are considered a more otaku hobby in Japan.
Nintendo, currently, seems to represent a balance of aesthetics, themes, and games that are more popular in Japan. Games which are fairly non-violent in Japan. Games which appeal to both boys and girls and people of all ages. Nintendo has always had some games for girls like Balloon Kid and Panel de Pon an so forth. And uses a degree of cuteness which is popular in Japan without going to deep into or focusing on the moe niche. Japan makes lots of games starting cute anthropomorphic characters like Kirby and Pikachu and cute moe girls, but there's also a balance giving Nintendo a well-rounded and family friendly atmosphere.
That's my hypothesis, at least.