Euchema cottonii
Nori is made by shredding edible seaweed and then pressing it into thin sheet. You can find it in Asia food stores.
There is no specific name for fear of seaweed, however, phytophobia is the fear of plants which is the closest name for fear of seaweed.
Iwo Jima in Japan
seaweed
Yes, Kelp is a seaweed. Seaweed is the common name for most marine algae. Kelp is a type of brown seaweed. See related link
Dulse
alga
The largest "Y-starting" cities in Japan and South Korea are: Yokohama, Japan AND Yeongcheon, ROK
lato
Eucheuma
Look up Susswassertang on wikipedia. Freshwater plant whose name means freshwater seaweed. Yes, I live on a lake and we have A TON of seaweed
Caulerpa lentillifera