About OKABE TOORU
About 東大 生産技研
About トライボロジスト
About rare earth element
About rare metal
About recycling
About Neodymium
About Dysprosium
About permanent magnet
About mining operations
About environmental damage
About storage and accumulation
About Environmental Pollution
About market trend
About utilization
About reuse
About stockpile
About Metallic materials in general
About Recycling of resources
About Materials of solid-state devices
About Mine,mineral and energy resources in general
About レアメタル
About レアアース
About 動向
About 将来
About 戦略
About 現状
About 問題