Koei, the renowned Japanese video game company's founder expresses surprise over the rapid growth in the market size. With the gaming industry flourishing, Koei has found itself in an advantageous position due to steady sales and increasing popularity. The founder's comments seem to reflect a wider trend of surprise within the industry, as gameplay becomes a more mainstream and accepted form of entertainment globally.

The video game industry in Japan holds immense cultural and economic significance, with people valuing creative and innovative game design. Japanese consumers have always supported home-grown industries, making local video game companies like Koei enormously successful. The founder's surprise could also indicate the rapid change in societal attitudes towards gaming in Japan.

In comparison, the video game industry of the US and EU also see similar trends and growth. However, the consumer bases in these regions are more diversified with preferences for games developed both domestically and internationally. The surprise expressed by the Koei founder may not be as surprising in the US or EU markets, as they are more accustomed to the fluctuating trends of the global video game industry.