Preprint

1. W. Ye, Y. Gong, T. Harada, Z. Kang, K. Kohri, D. Saito and C. M. Yoo, “Primordial Black Hole Formation and Spin in Matter Domination Revisited,” [arXiv:2508.10070 [gr-qc]].
2. A. Katsumata and T. Harada, “Periapsis shift in the Zipoy-Voorhees spacetime,” [arXiv:2507.04280 [gr-qc]].
3. Masahiro Shimano, Tomohiro Harada and Naoki Tsukamoto, “A trapped surface in the higher-dimensional self-similar Vaidya spacetime,” arXiv:1108.3471 [gr-qc].