Luggage Storage Location At Tokyo Station

I would like to know the location of luggage storage at Tokyo Station. Is there any luggage storage outside the gate or before entering the gate ?
Thank you in advance for your assistance.

Do you mean the coin-operated lockers?
If so, there are lots of them scattered all over outside of gates.

Yes, Mei.
It's because I plan to keep my check in luggage at the luggage storage before the gate at Tokyo Station while I am visiting Tokyo for 2 days before leaving to Kyoto the other day.
Thank you very much for your support, I appreciate it.

In storage for 2 days? Most coin lockers don't operate past midnight.

Well noted, so it means Ii cannot keep my luggage more than 24 hours, rite ?

I thing most is upto 3 Days, I once left all my chocolate and present, and left for kusatsu and returned to collect them, you just have to insert enough coins to cover the amount owning and to collect your belongings.

Most allow up to 3 days of storage, but some are good for 1 day only (and few allows up to 5 days). So, better read the instructions before use.

Most define 1-day as ending at midnight (some at 02:00am), but some define as 24 hours from initial use.

Deposit method varies, also. Some allow you to deposit for the maximum expect usage period, others collect "overdue" amount at the time of retrieval.

Bottom line: Each locker has its own policy, read before usage.