In the past, countries, Japan has not been good enough for water management. The flood water and waste problems, toxic substances were found. The chemicals in the River, etc.
In the past, Japan has not been a good enough deal. Seen from flooding Waste water sources And problems of toxins found The chemicals in the river, etc.
In the past, Japan has not good water management as seen from the flooding problem in water resource and waste problems found toxic chemicals in the river.