Some information on parking lots around the Temple:
Recommended:
Little Tokyo Mall Parking on 1st St. - the parking structure access is through a garage next to the Miyako Inn Hotel.
There is an alternate entrance to the same structure on San Pedro between 1st and 2nd St. (next to Union Bank) - $4 flat rate
For those of you that want an address to get your Google map directions here is the address to the Miyako Inn Hotel which is located right next to the garage:
328 East 1st St., Los Angeles, CA 90012
Others:
Advanced Parking System on corner of 1st and Central Ave. - $6.50 flat rate
5 Star Parking on 2nd St. - $4 flat rate
From this structure you can get to the temple by walking through the Japanese Village Plaza from 2nd St. to 1st St.
More here:
http://www.elittletokyo.com/En/parking.htm