[2] Watanabe retired from that post in July 2005, but the Yamaken-gumi remains largely loyal to him.
[4] On 16 September 2021, the Yamaguchi-gumi announced that it will be welcoming back Yamaken-gumi members who had disunited from them in 2015.
As a result, the Yamagken-gumi once again became the umbrella organisation of the Yamaguchi-gumi.
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