Deliver the Roses to Iyama
Iyama needs one rose to help him and Professor Yoshikawa with their research.
You can buy them at "Flowers 2 Go" in the northern part of Yokohama.
Give him the rose.
As reward, you will get the Extract Recipe: Willow Snake.
Deliver the Garlic to Iyama
Iyama now needs garlic.
You can buy it in the same park but a different shop.
It's at the "Hero's Harvest"
Give him the garlic.
Reward: Extract Recipe: Rushing Tiger
Deliver the Four Leaf Clover to Iyama
Iyama now needs one Four Leaf Clover.
Head back to the flower shop. They sell them.
Give it to Iyama.
Reward: Extract Recipe: Dancing Crane