The Toei Tokusatsu Fan Club app has a producer roundtable discussion with a lot of interesting info about the show:
- Planning for Zero-One started in during the summer of 2018 while Build was airing.
- Auditions began in April 2019, finishing around May. - Producer Omori visited NII (National Institute of Informatics) and talked with about 10 professors about their feelings on AI.
- They also visited AIST (National Institute of Advanced Industrial Science and Technology), where they making robots and advancing 3D printers.

Here's a thread on the Japanese of Kamen Rider Saber.
Let's start with his catchphrase.
「物語の結末は俺が決める！」
"I'll be the one to decide how this story ends!"
The emphasis is on the conclusion of the story, with Saber announcing proclaiming he's the one who be ending it The kanji on the right edge of the logo is 聖刃.
They read as the following:
聖/Sei - Holy/Sacred
刃/ha - Blade
Putting them together makes Seiba (ha becomes ba when joined).
In other words, Saber.

The second kanji is also used for Yaiba in Zero-One

Bored at work today 1.) Kirin Ranger's Daisuke Tsuchiya was originally cast as Ryuu Ranger, but was changed after doing some test shooting