Paris Hilton is back on US soil home and is already making plans to go back to Japan, RadarOnline.com has confirmed.

Paris boarded her private jet in Tokyo and headed for her homeland at 12:00am PST on Wednesday morning and arrived safely in Van Nuys, CA on Wednesday afternoon.

Paris Hilton Hatches Plea Deal To Avoid Prison

Sources close to the hotel heiress tell RadarOnline.com, “Paris is exhausted, and very, very upset that she was unable to meet with the people that work for her brands in Asia.

“Paris doesn't want others to suffer because of her legal situation. It's unfortunate, but she is already planning for another trip back to Asia."

PHOTOS: Paris Hilton Leaves Japan; Tweets 'I Promise To Come Back Soon'

The source goes on to say that Paris was disappointed that she wasn’t able to enter Japan legally but it wasn’t from lack of trying. Apparently, the heiress was unaware she needed a special extra visa due to the fact that she had pled guilty to a misdemeanor drug charge on Monday.

“Paris did have a work visa for the trip, but she was unaware that she needed the additional paperwork until she landed in Tokyo,” the source says.

PHOTOS & VIDEO: Paris Hilton Pleads Guilty To Two Misdemeanors; Avoids Jail For Cocaine Arrest