About SAWADA KENJI
About 石油天然ガス・金属鉱物資源機構
About Journal of MMIJ
About exploration (ore deposit)
About mineral resource
About economic analysis
About Copper
About acquisition
About mine development
About mining operations
About ore dressing
About smelting
About transportation
About costing
About project
About price
About fluctuation and variation
About acquisition
About corporate acquisition
About price change
About calculation
About economic analysis
About 探鉱コスト
About Production in general
About Preliminary investigation and mining preparation in general
About Mine development and construction
About 探鉱
About 活動
About 資源
About 経済的評価
About 銅
About 役割