1. Suzuki, Taku; Watanabe, Kiwamu; Varieties with nef diagonal, to appear in Internat. J. Math., [arXiv].
2. Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu;  Correction to: A characterization of symplectic Grassmannians. Math. Z. 292 (2019), no. 1-2, 569-570, [Online]. 
3. Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu;  Characterizing the homogeneous variety F4(4). Math. Nachr. 291 (2018), no. 14-15, 2334-2346. [arXiv], [Online].
4. Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu; Wisniewski, Jaroslaw A. Fano manifolds whose elementary contractions are smooth P1-fibrations: a geometric characterization of flag varieties. Ann. Sc. Norm. Super. Pisa Cl. Sci. (5) 17 (2017), no. 2, 573-607, [arXiv], [Online].
5. Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu;  A characterization of symplectic Grassmannians. Math. Z. 286 (2017), no. 3-4, 1421-1433 [Online].
6. Watanabe, Kiwamu;  Low-dimensional projective manifolds with nef tangent bundle in positive characteristic. Comm. Algebra 45 (2017), no. 9, 3768-3777 [Online].
7. Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu;  Uniform families of minimal rational curves on Fano manifolds. Rev. Mat. Complut. 29 (2016), no. 2, 423-437 [Online]. 
8. Munoz, Roberto; Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu; Wisniewski, Jaroslaw A. A survey on the Campana-Peternell conjecture. Rend. Istit. Mat. Univ. Trieste 47 (2015), 127-185 [Online]. 
9. Watanabe, Kiwamu;  Fano manifolds with nef tangent bundle and large Picard number. Proc. Japan Acad. Ser. A Math. Sci. 91 (2015), no. 6, 89-94 [Online].
10. Munoz, Roberto; Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu Rational curves, Dynkin diagrams and Fano manifolds with nef tangent bundle. Math. Ann. 361 (2015), no. 3-4, 583-609 [Online].
11. Watanabe, Kiwamu P1-bundles admitting another smooth morphism of relative dimension one. J. Algebra 414 (2014), 105-119 [Online]. 
12. Watanabe, Kiwamu Fano 5-folds with nef tangent bundles and Picard numbers greater than one. Math. Z. 276 (2014), no. 1-2, 39-49. [Online].      
13. Watanabe, Kiwamu On projective manifolds swept out by cubic varieties. Internat. J. Math. 23 (2012),no. 7, 1250058, 22 pp.  [Online].
14. Watanabe, Kiwamu Classification of embedded projective manifolds swept out by rational homogeneous varieties of codimension one. Pacific J. Math. 252 (2011), no. 2, 493-498. [Online]. 
15. Watanabe, Kiwamu A bound of lengths of chains of minimal rational curves on Fano manifolds of Picard number 1. J. Algebra 337 (2011), 224-232.  [Online].
16. Watanabe, Kiwamu Lengths of chains of minimal rational curves on Fano manifolds. J. Algebra 325(2011), 163-176. [Online].
17. Watanabe, Kiwamu Actions of linear algebraic groups of exceptional type on projective varieties. Pacific J. Math. 239 (2009), no. 2, 391-395. [Online].
18. Watanabe, Kiwamu Classification of polarized manifolds admitting homogeneous varieties as ample divisors. Math. Ann. 342 (2008), no. 3, 557-563. [Online].

Preprints

1. Watanabe, Kiwamu ; Fano manifolds of coindex three admitting nef tangent bundle,  [arXiv].