1.5 USD/GBP is an indirect exchange rate, and the exchange rate is positively related to the value of GBP. So sell the exchange rate of "USD/GBP" in the foreign exchange market;
120 JPY/USD is the direct exchange rate, and the exchange rate is negatively correlated with the value of JPY. Therefore, the "yen/dollar" exchange rate is still sold in the foreign exchange market.
The scale of hedging depends on hedging instruments, futures, options or option futures.