Is this a realistic path to moving to Japan and eventually naturalizing? (child of Japanese national)

Hi, I’m looking for advice from people who are familiar with Japanese immigration or have been in a similar situation.

I’m a 25F Filipino graphic designer currently living in the Philippines. I work remotely for a foreign company. I want to get my Japanese citizenship since my biological dad is Japanese and currently lives in Japan.

Background:
• My biological dad is a Japanese national
• My Filipino mom lives in Japan and is working toward PR
• My younger sister is now a Japanese national (they moved from PH to JP during covid and she got her Japanese passport after 1 year of living there)
• My immediate family all currently live together in Japan
• I only hold a Philippine passport with a multiple entry visiting relatives visa valid for 30 days per visit

I was born when my dad was 20 and before he formally chose Japanese citizenship. My parents also didn’t know at the time that I needed to be registered within 3 months of birth to get Japanese nationality, so I missed that window.

I’ve spoken to a few immigration offices online and was told a possible path could be:
• Move to Japan on a long-term “Child of a Japanese National” visa
• Live with my family, work and pay taxes while studying Japanese
• After abt 3 years of living in Japan, apply for naturalization

My questions:

1. Is this timeline realistic? Is there any law / special case that I can utilize to make it shorter? I've read about "simplified naturalization" that could possibly shorten it to 3 years but I'm not sure if that's in effect.
2. Has anyone here naturalized after entering Japan on a “Child of Japanese National” visa?
3. Are there common reasons cases like this get rejected even with a Japanese parent.

I’m just trying to figure out if this is a viable long-term plan before making big life changes. Thanks in advance for any insight / advice!