Related by context. Frequent words. (Click for all words.) 49 Masahiko 48 Ehime 48 Yoshiko 46 Yumiko 46 Nagaoka 46 Masashi 45 Keisuke 45 Hiroaki 45 Osamu 44 welfare 44 Yoshihiro 44 Waseda University 43 Takashi 43 Yukiko 43 Masaru 43 Kitamura 43 Naoko 43 Shinichi 43 Keiji 43 Sachiko 43 Takahiro 43 Kazuhiro 43 Nobuo 42 Yosuke 42 public broadcaster NHK 42 Kimiko 42 gerontology 42 Satoshi 42 Hiroko 42 Hyogo 42 Yoshinori 42 Toshio 42 Toru 42 Junichi 42 Chuo 42 Kaoru 42 Akihiro 42 Eiji 41 Kazuhiko 41 Yasuhiro 41 Masao 41 Yasushi 41 Imai 41 Megumi 41 Keiichi 41 Hiroki 41 Hiroshi 41 Koichi 41 Toshiyuki 41 Masami 41 Yoshiaki 41 Kazuo 41 Iwate 41 Kyoko 41 Niigata 40 Kasahara 40 Fukuoka Prefecture 40 Chiba 40 NHK 40 Tohoku 40 Kanazawa 40 Iwate prefecture 40 Yasuo 40 Shigeru 40 Gunma 40 Hideo 40 Hiroyuki 40 Tatsuya 40 Hyogo Prefecture 40 neuropsychology 39 Gerontology 39 Dai Ichi Life 39 Yutaka 39 Hajime 39 Atsushi 39 Tsutomu 39 Minamisoma 39 NLI Research 39 Katsumi 39 Takao 39 Yoshio 39 Yuka 39 Ibaraki 39 Niigata prefecture 39 Masaaki 39 Hideaki 39 Yuko 39 broadcaster NHK 39 Koji 39 Iwate Prefecture 39 Kohei 39 gerontologist 39 Akira 39 Takuya 38 Cognitive Science 38 Masahiro 38 Yuta 38 bioethics 38 Mizuki 38 epidemiology 38 Shimbun