Are 'Kenzan' and 'Ishin' Related as 'Yakuza' Game Spin-Offs?

Are "Yakuza Kenzan" and 'Like a Dragon: Ishin!' related? These two spin-offs take place at different points during the feudal era of Japan.
Are Yakuza Kenzan and 'Like a Dragon: Ishin!' related? These two spin-offs take place at different points during the feudal era of Japan.

New Ryu Ga Gotoku Ishin details from Dengeki Playstation - Yakuza Fan

Yakuza spin-off Like a Dragon Ishin will be released in 2023

Category:Spin-Offs, Yakuza Wiki

Like a Dragon Ishin shows off 'All-Star' cast and confirms February release

Games/spin off concepts,here we gooo : r/yakuzagames

Yakuza Series Producer Still Wants to Bring the Two Most Obscure Titles to America

Like a Dragon: Ishin! Review

Yakuza Series Producer Talks About Future of the Franchise, Localisation, Samurai Spin-offs - KeenGamer

Should I import Ishin or Kenzan? - Yakuza Fan

Yakuza 8 devs can't decide what their game is actually called