Tenkaichi Junior (天下一Jr., Tenkaichi Junior) is an annual professional wrestling round-robin tournament held by Pro Wrestling Zero1 to determine the top junior heavyweight wrestler in the promotion, typically contested in late November/December.
In addition to Zero1 members, it has frequently included outside stars, mainly freelancers performing in the Japanese independent scene.
The inaugural edition of the tournament was held between November 15 and December 15, 2002.
The finals of the edition were also disputed for the vacant Zero1 International Junior Heavyweight Championship.
The finals of the edition were also disputed for the vacant Zero1 International Junior Heavyweight Championship.