Ikumi Akasaka. Diurnal cycle of surface wind and its seasonality at Manila, Philippines from 1890 to 1900. Geographical Reports of Tokyo Metropolitan University. 2023. 58. 1-8
Watanabe, M., Akasaka, I., Tashiro, T., Osada, T., Murata, T., et al. Characteristics of soil erosion on upland margin slopes in the Institute for Nature Study. Miscellaneous Reports of the Institute for Nature Study. 2022. 54. 27-36
Horiuchi, H. and Akasaka, I. Regional characteristics on diurnal temperature range around Koto-ward, Tokyo on clear summer days. Bulletin of the Institute of Natural Sciences. 2022. 53. 33-38
Akasaka, I. and Endo, T. Rainfall characteristics at the institute for Nature Study, Tokyo and their interannual variability. Geographical Reports of Tokyo Metropolitan University. 2022. 57. 47-54
Masaaki SHIRAI, Sadao TAKAOKA, Ikumi AKASAKA, Takako UTSUGAWA, Sayuri KATO. Disturbance and consequent changes of riverbed environments by Typhoon HAGIBIS Flood in 2019 at the middle reaches of the Tama River, central Japan. Geographic Reports of Tokyo Metropolitan University. 2022. 57. 39-46
Akasaka, I. Endo, T. and Yano, R. Rainfall characteristics in the Institute for Nature Study in October and its long-term changes. Miscellaneous Reports of the Institute for Nature Study. 2020. 52. 13-18
Sesasonal changes in rainfall and surface wind at Manila for the late 19th century
(The international workshop on climate, water, land, and life in Monsoon Asia 2023)