Do i need to consider changing job with this salary?

Do i need to consider changing job with this salary?

(Edit: 5.5~6m – gross salary 350K + bonus 800K + 480k yearly rent allowance)

I'm 29 years old, finished my PhD here in Japan (major Computer Vision-Cybersecurity). Last year i graduated and started working with a Japanese automotive manufacturing company (was direct hiring as middle career). I guess they considered my PhD as previous experience but that didn't help much with what they offered. I accepted the offer last year pretty much because of the company reputation, and also because i didn't have any industrial experience (just few internships and few academic projects on my portfolio). My current Japanese is around N3, although i rarely use it (they still consider using English with me since the start of the job).

I'm getting salary of 265.000 (after tax and rent) including 20h of overtime. And yearly bonuses around 800,000 (might increase by next year). 40K allowance of rent.

Time of work is super flexible and allowing to work from home 3 days a week (or more).

I like my current job, but i want to get some opinions from more experienced people here, i feel like am getting low paid (i know i have to be patient since i don't have much of industrial experience), but still 265,000 for someone with PhD and got hired as middle career, am not sure if it's normal.

I would like to get advice from expert in the IT field on these options:

1- Ignore focusing on salary and be patient with my current job (at least more two years) and focus on improving soft skills.

2- Consider changing jobs (having one year of experience) and aim for 20% increase of salary.