How do you handle tax filing in both India and Japan during an Intra-Company Transfer (ICT)?

Hi all,
I’m being sent from India to Japan on an Intra-Company Transfer (ICT) for 2 years. This is a temporary assignment (not a permanent relocation), so it seems I’ll have to file taxes in both countries — India and Japan.

The Japan side has flagged concerns about dual tax filing and mentioned that it could cost around $2,000–$3,000/year through professional consultants, which feels quite expensive.

I’d really appreciate if anyone who has gone through something similar could help with:

• How do you manage tax filing in both countries?
• Is it possible to file taxes yourself, or is it safer to go through a consultant?
• Any recommendations for affordable consultants in India or Japan?
• How do you handle Form 67 in India and the 確定申告 (Japan tax return)?
• Does the India–Japan DTAA work smoothly in practice for avoiding double taxation?

Thanks in advance for any tips or personal experiences!

Took help from ChatGPT to write down the description