Items in sun shop - sun coin cost - coupon cost - sun coins per coupon

Seal scroll frag - 50 - 10 - 5

Summon scroll frag - 25 - 5 - 5

Ability Scroll frag - 50 - 10 - 5

Advanced Refine Rune - 150 - 35 - 4

Charm Materials Pack - 500 - 125 - 4

Level 2 Magatama - 100/75 - 15/12 - 7/6

Element Scroll - 400 - 55 - 7

Level 1 Magatama - 25/19 - 5/4 - 7/7

Level 1 Rainbow Magatama - 30 - 7 - 4

So, based off this we can figure that 1 coupon is = 4-7 sun scrolls. So, rewards for 9tails should be adjusted:

1st place - 60 coupons - 240 to 420 sun scrolls.

2nd place - 45 coupons - 180 to 315 sun scrolls

3rd place - 30 coupons - 120 to 210 sun scrolls

Killing hit - 30 coupons - 120 to 210 sun scrolls

Participation - 25 coupons - 100 to 175 sun scrolls

Your current rewards are the same as reducing 1st prize from 60 to 8, 2nd from 45 to 6, and 3rd from 30 to 4 coupons. Who the heck Is going to do 9tails event for less than 4 coupons!?!?!?!! I might see going on the low end of the scale if you had finished Shinobi Conquest and Rogue Ninja Outburst, but we are missing those 2 methods of getting Sun scrolls. So, I would suggest the following for 9tails rewards until you get Shinobi Conquest and Rogue Ninja Outburst Released....

1st place - 400 sun scrolls

2nd place - 300 sun scrolls

3rd place - 200 sun scrolls

killing hit - 200 sun scrolls

participation - 150 sun scrolls

These numbers seem very consistent with the rewards for Sage world, Matsuri, and Jin Rescue.