Windows
Hold Alt and type 0165 on the numeric keypad.
Currency
Copy the character, or use the shortcut that matches your keyboard and app.
Hold Alt and type 0165 on the numeric keypad.
Option + Y
Type 00A5 then Alt + X
Insert → Special characters → yen
Click the keycap, then paste with Ctrl+V or Cmd+V.
Num Lock on, hold Alt, type 0165, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+00A5¥¥\00A5\u{00A5}Alt + 0165