Received April 9, 2001; accepted April 23, 2001. The Research Group for Population-based Cancer Registration in Japan estimated cancer incidence in Japan in 1996 based on data from 10 population-based cancer registries: Miyagi, Yamagata, Kanagawa, Niigata, Fukui, Osaka, Tottori, Hiroshima City, Saga and Nagasaki. The methods of estimation and its limitations are explained in previous papers (1–3). The number of incidences, crude rates, age-standardized rates and completeness of registration in 1996 are shown in Table 1 and the age-specific number of incidences and the rates are shown in Tables 2 and 3 according to sex and primary site. The number of incidences for 1996 was estimated as 473 000. The time trends of age-standardized incidence rates for major sites in 1975–96 standardized to the world population are shown in Fig. 1 and those standardized to the 1985 Japanese model population are shown in Fig. 2. The leading site in age-standardized incidence rate was stomach for males and breast for females in both Figs 1 and 2. Estimated cancer incidence data in Japan by sex, site, five-year age group and calendar year during the period 1975–96 are now available on a Web-site on Homepage of the Month (http://www.iph.pref.osaka.jp/omc/ocr/) or by correspondence with the principal investigator of the Research Group (Dr A. Oshima). In 2000 the Research Group conducted the 27th survey on cancer incidence and cancer medical care with the cooperation of the Aichi Cancer Center (Dr T. Kuroishi) and contributions from 14 cancer registries: Miyagi (Dr S. Hisamichi), Yamagata (Dr T. Matsuda), Chiba (Dr H. Mikami), Kanagawa (Dr T. Nagaoka), Niigata (Dr K. Ogoshi), Fukui (Dr M. Fujita), Aichi (Dr M. Inoue), Shiga (Dr H. Shio), Osaka (Dr A. Oshima), Hyogo (Dr T. Ishida), Tottori (Dr T. Kishimoto), Hiroshima City (Dr K. Koyama), Saga (Ms A. Maeda) and Nagasaki (Dr M. Soda). The study was supported by a Grant-in-Aid for cancer research (8–2) from the Japanese Ministry of Health, Labour and Welfare. *This report was prepared by Wakiko Ajiki, Noriko Kinoshita, Hideaki Tsukuma and Akira Oshima, Department of Cancer Control and Statistics, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan For reprints and all correspondence: Wakiko Ajiki, Department of Cancer Control and Statistics, Osaka Medical Center for Cancer and Cardiovascular Diseases, Nakamichi 1–3–3, Higashinari-ku, Osaka 537-8511, Japan. E-mail: ajiki-mi@umin.ac.jp Abbreviations: ICD-10th, International Classification of Diseases, 10th Revision; DCO/I, proportion of cases with the death certificate only to incident cases; I/D, number of incidences/number of deaths; HV/I, proportion of histologically verified cases to incident cases; CIS, carcinoma in situ Figure 1. Trends of age-standardized cancer incidence rates for major sites (standard population: world population). Figure 2. Trends of age-standardized cancer incidence rates for major sites (standard population: 1985 Japanese model population). Incidence, completeness of reporting and accuracy of diagnosis in Japan according to sex and primary site, 1996 *Per 100 000 population. ICD-10th, International Classification of Diseases, 10th Revision; DCO/I, proportion of cases with the death certificate only; I/D, number of incidences/number of deaths; HV/I, proportion of histologically verified cases to incident cases. Incidence, completeness of reporting and accuracy of diagnosis in Japan according to sex and primary site, 1996 *Per 100 000 population. ICD-10th, International Classification of Diseases, 10th Revision; DCO/I, proportion of cases with the death certificate only; I/D, number of incidences/number of deaths; HV/I, proportion of histologically verified cases to incident cases. Age-specific incidence in Japan according to sex and primary site, 1996 ICD-10th, International Classification of Diseases, 10th Revision. Age-specific incidence in Japan according to sex and primary site, 1996 ICD-10th, International Classification of Diseases, 10th Revision. Age-specific incidence rate per 100 000 population in Japan according to sex and primary site, 1996 ICD-10th, International Classification of Diseases, 10th Revision. Age-specific incidence rate per 100 000 population in Japan according to sex and primary site, 1996 ICD-10th, International Classification of Diseases, 10th Revision.
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