Silk 100 yen shop: Cheap food & stuffs
They offer a good variety of products such as snacks, groceries, kitchenware, tableware, toys, gift etc. They even have a small section that offers fresh fruits and vegetables.
Most of the items are 100 yen except for the prices for the fresh fruits and vegetables. They may cost less or more than 100 yen.
100 Yen Stores: 100 Yen Store
There are 2 100 yen stores in Yokosuka, within waking distance of the train stations. The best one is across from the Daiei Mall (pedestrian bridge across the street). The 100 Yen store has small toys and dishes, ramen, sunglasses...
What to buy: My favorite purchase was a Barbie doll Kimono as a gift for my niece (for 100Y, of course).
What to pay: Everything is 100 Yen!!
Various department stores: Yokosuka Chuo-O-dori Street
Department stores, banks and other businesses dominate Chuo-O-dori, Yokosuka's main street, and bustling crowds of business people and shoppers pass to and fro throughout the day. The Yokosuka Minato Matsuri (Port Festival), the Mikoshi (portable shrine) Parade and other events as well as the streets lined with verdant trees and the illumination all bring delight to visitors
What to buy: various
The Japanese love diamonds
I thought diamond engagement rings were mainly an American thing, but I think the Japanese girls like them even more.
What to pay: Everything is super expensive. Luckily I wasn't looking at the time.