CNN reports Japanese officials on Sunday criticized Carlos Ghosn's escape from the country.
Calling it 'unjust', Japan vowed to tighten immigration rules in their first public remarks since the former auto executive fled for Lebanon a week ago.
Japan's top justice official, Justice Minister Masako Mori, said Ghosn left Japan illegally by unjust methods.'
She said that there is no official record of Ghosn's departure from Japan, and that prosecutors are investigating the case.
Justice Minister Mori also said she's ordered Japan's immigration department to further tighten rules for leaving the country.