Japan 225 is just a number that lets you track performance of the instruments comprising the index, so you can't invest in it directly. But you can buy Japan 225 futures or funds or invest in its components.
The lowest ever quote of Japan 225 is 6945.7 USD. It was reached on Mar 9, 2009.
Japan 225 reached its highest quote on Mar 21, 2024 — 40718.5 USD.