For most of my friends a VG-10 would already be too hard to handle. (Chipping etc...)
I asked chatGPT for a giggle:
"Give me a list of santoku kitchen knives that cost less than 100$ and that are 180mm long
10/5/2023, 7:46:15 AM
Here is a list of santoku kitchen knives that are 180mm long and cost less than $100:
1. Victorinox 7-Inch Fibrox Pro Santoku Knife
2. J.A. Henckels International Classic 7-Inch Santoku Knife
3. Wusthof Classic 7-Inch Santoku Knife
4. Mercer Culinary Genesis 7-Inch Forged Santoku Knife
5. Shun Sora 7-Inch Santoku Knife
6. Global 7-Inch Santoku Knife
7. Dalstrong Gladiator Series 7-Inch Santoku Knife
8. Cangshan S1 Series 7-Inch Santoku Knife
9. Tojiro DP 7-Inch Santoku Knife
10. Zwilling J.A. Henckels Four Star 7-Inch Santoku Knife
Please note that prices may vary depending on the retailer and any ongoing promotions. It's always a good idea to read reviews and compare prices before making a purchase."
Edit: Fujiwara FKM series has a 180mm santoku which would be a solid option.