@oksana126 Those companies do look interesting, I haven't researched them yet, and I'm not that knowledgeable. But, Miroku Jyoho Service might be driven off the market? Many other similar services exist (if my understanding of your blog is correct, they're similar to moneyforward that offers financial and tax systems?)
Will definitely look into them over the weekend.
Personally, when investing investing in smaller companies I make the decision based on "do I want to own this company?" So rather than stock price, if the business is good then maybe take it private in the future? Probably easier than starting a company from ground up