About OKABE TOORU
About 東大 生産技研
About precious metal
About rare metal
About resource
About supply
About technology development
About quality
About cost
About environmental engineering
About material
About recycling
About definition
About demand
About fluctuation and variation
About Platinum
About precious metal ores
About price change
About high quality
About alternative material
About low cost
About utilization
About reuse
About environmental engineering
About low cost
About Nobel metal catalysts
About 貴金属
About レアメタル
About 現状