Therefore the government, citing the Antimonopoly Law (monitored by the Fair Trade Commission), has decided to curb excessive competition over tofu prices. It seems rather paradoxical that a Law against monopolies is now being used to reduce competition, but it can be compared to regulations against predatory pricing.
The government has declared that the supermarkets must trade fairly with tofu manufacturers and not force them to lower their prices. The government is probably concerned that almost half of tofu manufacturers have quit the market. There are now only about 3300 firms, compared with about 6500 firms 20 years ago.
The situation is analogous to the global clothing market, where large clothing shops (eg H&M, Zara) can force the competitive clothing makers (who come from many, many countries such as Bangladesh, Vietnaam, Honduras etc etc) to supply them with clothing at very, very low prices. The unbalanced bargaining position means that clothing makers are often working long hours at low wages in unsafe conditions. This can be viewed as unfair, but there is no international government to remedy the problem.