Japanexports of Alkaline-earth metals; calcium was $12.37K . Japanexported Alkaline-earth metals; calcium to China ($12.37K )Japanexports of Alkaline-earth metals; calcium was $12.37K . Japanexported Alkaline-earth metals; calcium to China ($12.37K ).Alkaline-earth metals; calcium imports by country in 2021