V.Challenge League - Japan - was created in 1994.
Japan Handball League was created in 1976.
Japan Football League was created in 1999.
Japan Soccer League ended in 1992.
Japan Soccer League was created in 1965.
Japan Amateur Radio League was created in 1926.
Japan Ice Hockey League was created in 1966.
Japan Revolutionary Communist League was created in 1957.
Japan Labour Union League was created in 1926.
Young Communist League of Japan was created in 1925.
Japan
First of all, action against a country required a unanimous vote in the League of Nations. As a member of the League of Nations, Japan also had to the right to veto the action. Several members had valuable trade agreements, and were reluctant to vote to apply sanctions on Japan since it might hurt their agreements. As a result, the League of Nations was a failure, and Japan remained in Manchuria.