What I have in mind is the period after European powers and USA by use of force "opened" the larger parts of Asia, until late 20th. century. The "expansive" or "imperialist" powers were those mentioned, but then also at least the Japanese until 1945. Who else? Has some modern nationalist, not from Japan also adopted expansionist dreams and practices? As far as they have existed (here some movements more based upon religion than nationality may be included), how then did they differ from the European ones?