No, you cannot use English money (Pounds Sterling) for daily transactions in Japan; the only legal tender is the Japanese Yen (¥). While Japan has modernized significantly by 2026, it remains a society where "cash is king," especially in smaller shops, temples, and rural areas. While major hotels and department stores in cities like Tokyo and Osaka will accept international credit cards, you will need Yen for everything else. You can exchange your Pounds for Yen at "Travel Money" bureaus in major airports (Narita, Haneda) or, more conveniently, withdraw Yen directly from 7-Eleven (7-Bank) or Japan Post ATMs, which generally offer competitive exchange rates. It is highly recommended to use a card with "zero foreign transaction fees" for these withdrawals to avoid the high costs associated with traditional currency exchange booths.