Tokyo Interbank Offered Rate.
There are two types of TIBOR: JPY TIBOR and Euroyen TIBOR.
The underlying market for JPY TIBOR is the Japan unsecured market.
JPY TIBOR is widely used as a base rate for bank loans in Japan including syndicated loans.
Euroyen TIBOR's underlying market is the Japan Offshore Market (in which financial institutions including banks and non-residents execute JPY transactions).
Euroyen TIBOR is mainly used for derivatives and is not used as often for loan transactions.
In October 2018, the administrator JBATA published its first public consultation document called “Approach for Integrating Japanese Yen TIBOR and Euroyen TIBOR” as a part of TIBOR reforms.
Not to be confused with JPY LIBOR.