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.

El productor de Yakuza quiere traer a Occidente los spin-off de Yakuza Ishin y Kenzan

Yakuza games in order: Like a Dragon release and story timeline

Ryu Ga Gotoku Ishin!, Yakuza Wiki

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

Like a Dragon: Ishin! Review

Like a Dragon: Ishin! - Wikipedia

Since the Kiryu saga has Kenzan/Ishin, do you think the Ichiban saga should have a fantasy JRPG spin-off set in a Final Fantasy/Dragon Quest/Xenoblade-esque world? Would you want want one? : r/yakuzagames

Like a Dragon: Ishin is a remake of the lost Yakuza game, out in February

Yakuza Producer Confirms There Is No Goro Majima Spin-Off In The Works - PlayStation Universe

Finally decided to import Kenzan! Also came with the guide and Ishin for PS4. Gonna have fun playing these! : r/yakuzagames

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

Yakuza Kenzan Remake Would Need A Lot Of Time And Money,, 46% OFF

The next Yakuza game is in development - Gematsu

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

Yakuza Ishin! & Yakuza Kenzan! -Ryu ga Gotoku- (2Games) PS3 [Japan Import]