Stock exchanges earn major share of their profit from processing the orders.

They just lost at least a whole day of revenue.

After compiling some number for their annual report[1], I would say the loss from TSE revenue alone is roughly 2 million USD. But considering the effect trickling down the revenue stream where other security partners whose revenue depends on earning transaction fees, I would say the real damage would be many folds of that 2 million loss from TSE.

[1]: https://www.jpx.co.jp/english/corporate/investor-relations/i...