Group 1 - Toyota Motor Corporation has submitted a report to Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) detailing its progress in preventing certification irregularities [1] - The company is required to report quarterly on the implementation status of measures following emissions and safety test-rigging scandals involving its subsidiaries Daihatsu Motor, Hino Motors, and Toyota Industries Corporation [2] - In response to MLIT's concerns, Toyota has introduced a five-stage internal qualification system to maintain quality at vehicle certification test sites and ensure staff have the necessary skills [3] Group 2 - Toyota has strengthened its structures and systems to ensure employee awareness of legal compliance and proper job execution [4] - The company has implemented tighter on-site management, allowing senior management to take prompt action in case of procedural abnormalities [4]