Sources:
"A Concise History of Japan" (2015) by Brett L. Walker. Cambridge University Press, UK
"A Brief History of Japan" (2017) by Jonathan Clements. Tuttle Publishing, Tokyo.
Audio Requiring Attribution:
Torsodog: https://commons.wikimedia.org/wiki/File:Koto_performance.ogg ; https://commons.wikimedia.org/wiki/File:Drums_and_flute_at_Sanja_Matsuri.ogg
Pictures Requiring Attribution:
Sailko: https://commons.wikimedia.org/wiki/File:Giappone,_pietra_con_impugnatura_e_lama,_3000-2500_ac_ca._(tokiaki_yoshizawa_coll.).jpg ; https://commons.wikimedia.org/wiki/File:Giappone,_stumento_in_pietra_usata_come_punta_di_lancia_per_la_caccia,_3000-2500_ac_ca_(tokiaki_yoshizawa_coll.).jpg ; https://commons.wikimedia.org/wiki/File:Dinastia_sui,_coppia_di_figure_guardiane,_581-618_dc_ca.jpg ; https://commons.wikimedia.org/wiki/File:Giappone,_periodo_muromachi,_guardiano,_xv_secolo.jpg
江戸村のとくぞう: https://en.wikipedia.org/wiki/File:Museums_in_Yamanashi_prefecture-4b.jpg
Inazakira: https://en.wikipedia.org/wiki/File:Jomon_people_Skull_and_Restoration_model_-_Niigata_Prefectural_Museum_of_History.jpg
G41rn8: https://en.wikipedia.org/wiki/File:Sannai_IMG_20161009_143947.jpg
そらみみ: https://commons.wikimedia.org/wiki/File:Northern_Inner_City_in_Yoshinogari_Historical_Park_1.jpg
Motokoka: https://commons.wikimedia.org/wiki/File:Replica_of_bronze_halberd_at_Yoshinogari_Ancient_Ruins.jpg
Artanisen: https://commons.wikimedia.org/wiki/File:Queen-Himiko-Museum-Yayoi-Culture.png
Zhang zhicheng: https://commons.wikimedia.org/wiki/File:Reconstructed_Danfeng_Men.jpg
Firedrop: https://en.wikipedia.org/wiki/File:Standing_Komoku_Ten_(Virupakusa)_Heian_Period,_12th_century.tiff
Archeologo: https://commons.wikimedia.org/wiki/File:Museo_d%27Arte_Orientale,_Torino_20.jpg
Jnn: https://commons.wikimedia.org/wiki/File:Udamikumari_1246.jpg
震天動地: https://en.wikipedia.org/wiki/File:M%C5%8Dko_Sh%C5%ABrai_Ekotoba4.JPG
David Moore: https://en.wikipedia.org/wiki/Fil