South Korea's financial authorities will resume their on-site inspection this week into the Tokyo branch of Kookmin Bank suspected of extending illegal loans and creating slush funds, industry sources said Sunday. The Tokyo branch of South Korea's leading bank has been investigated over suspicions that it extended about 400 billion won (US$376.9 million) worth of illegal loans to Japan-based firms to secure returns, some of which were later used to amass slush funds here in Korea