J. Niwa
- 創立50周年記念式典および記念祝賀会 (50th Anniversary Ceremony of JCI and Its Celebration Banquet). Dans: Concrete Journal (JCI), v. 53, n. 9 ( 2015). (2015):
- 高品質軽量コンクリートの構造部材への適用 (Application of Super Lightweight Aggregates to Concrete Structures). Dans: Concrete Journal (JCI), v. 38, n. 12 ( 2000). (2000):
- コンクリート長大アーチ橋の設計・施工技術の現状と将来 (The State of the Art and the Future Prospects on Long-Span Concrete Arch Bridges). Dans: Concrete Journal (JCI), v. 39, n. 3 ( 2001). (2001):
- 土木学会「超高強度繊維補強コンクリートの設計施工指針 (案) 」の概要 (Outlines of JSCE "Recommendations for Design and Construction of Ultra High Strength Fiber Reinforced Concrete Structures (Draft)"). Dans: Concrete Journal (JCI), v. 43, n. 3 ( 2005). (2005):
- 高強度繊維補強モルタルを使用したPC構造物 (Prestressed Concrete Structures made with High Strength Fiber Reinforced Mortar). Dans: Concrete Journal (JCI), v. 45, n. 7 ( 2007). (2007):
- ステンレス鉄筋を用いるコンクリート構造物の設計施工指針 (案) の概要 (Recommendations for Design and Construction of Concrete Structures Using Stainless Steel Bars Draft). Dans: Concrete Journal (JCI), v. 46, n. 12 ( 2008). (2008):
- Outline of Revision of JSCE Standard Specifications for Concrete Structures─Maintenance─. Dans: Concrete Journal (JCI), v. 57, n. 2 ( 2019). (2019):
- Outline of Revised Editions of JSCE Standard Specifications for Concrete Structures- [Design] & [Materials & Construction]. Dans: Concrete Journal (JCI), v. 56, n. 8 ( 2018). (2018):
- Detecting the size effect in concrete beams using nonlinear fracture mechanics. Dans: Engineering Structures, v. 19, n. 8 (août 1997). (1997):