Lahore: Chief Minister Punjab Maryam Nawaz Sharif spent a busy day in Tokyo today. She remained busy for 16 hours in the official engagements during her 05-day official foreign visit and discussed matters pertaining to development projects with the Japanese officials till 12 o'clock mid night.She visited various institutions relating to urban development projects. She was briefed about the Japanese government methods being carried out for clean water, sewerage, waste water treatment, environmental improvement and saving the people from toxic carbon.She visited the historic port city of Yokohama to ascertain how Japan has transformed this coastal industrial city into a modern industrial city. She sought information from the perspective of modernizing Lahore and other industrial cities of Punjab.She also visited the ancient 'Red Brick Warehouse' and inspected a centre for teaching skills to the working class children. She also attended a major event of the Pakistani community in Japan.