I'd dismiss that idea as too costly to implement. If I were in their shoes I'd try a different approach.

Has been widely known that Japanese companies focus on longer term business goals instead of month-to-month gains, and I argue that worked alright for them.

Instead of valuing so much secrecy I'd make public a ten year business plan, and offer to buy the shares of those who lack the vision, patience, or interest in the company's goals. Thus giving freedom to the company by making those funds available to invest on a long term business plan. This would turn out to be much more affordable for the company.