My dear , in Chapter 10, Verse 25 of the Bhagavad-gita Lord Sri Krishna says,
"yajñānāṁ japa-yajño 'smi--Of sacrifices I am the chanting of the holy names, japa."
So if you will take up japa chanting very seriously with great determination you should know that you directly associating with Lord Sri Krishna and thus deriving unlimited benefits and blessings.