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Anchor text: "A Bit of Background"

Wikipedia: Kashima Shrine

Anchor text: "The Evolution of Classical Jojutsu" by Dave Lowry

Wikipedia: Musō Gonnosuke

Anchor text: Soke: Historical Incarnations of a Title and its Entitlements by William M. Bodiford

Wikipedia: Sōke

Anchor text: Hoki-ryu page at koryu.com

Wikipedia: Hōki-ryū

Anchor text: Entry on SMR at koryu.com

Wikipedia: Shintō Musō-ryū Jo Kata

Anchor text: Soke: Historical Incarnations of a Title and its Entitlements

Wikipedia: Grandmaster (martial arts)

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Wikipedia: Wang Shujin