All audio CDs are shelved in the Media Collection on the 3rd floor.
Use Advanced Search in the Library Catalog. Language=Japanese Format=Spoken Word
Here are some examples:
Dictionaries and Grammars are available in the East Asian Reference Room on the 22nd floor. There are also older dictionaries and extra copies of dictionaries in the stacks (some on the 12 floor and some on the 21st floor).