As of January 2018, the journals "ISIJ International" and "Tetsu-to-Hagané" will take the following notation system in the table of contents; as a result, all the publications in these journals will be placed in the same order as in the table of contents.
- Up to No. 12 issued in 2017:
- Classified by 14 research fields (Fundamentals of High Temperature Processes, Ironmaking, Steelmaking · · · etc.)
- From No.1 issued in 2018:
- Classified by the article categories (Review articles, Regular articles, and Notes). Each category is also classified by the research fields.