Necessity of Transit VISA during Tokyo to India to and fro journey

I am Indian citizen and I have to and fro flight like below:

NRT(Tokyo - Narita (NRT), Terminal 2 ) -> PEK (Beijing - Beijing Capital (PEK), Terminal 2 ) -> KMG(unming - Kunming (KMG) ) ->CCU (Kolkata - Netaji Subhas Chandra Bose Airport (CCU) )
and
CCU (Kolkata - Netaji Subhas Chandra Bose Airport (CCU) ) -> KMG(unming - Kunming (KMG) ) -> PEK (Beijing - Beijing Capital (PEK), Terminal 2 ) -> NRT(Tokyo - Narita (NRT), Terminal 2 )

Do I need a Transit G for the mentioned journey.

Please let me know on urgent basis.