1)在日暮里及上野轉車, 是否好似香港九龍塘咁, 出閘行過隔離就可以或者上下樓層? Similar but the distance is a bit far from the case at Kln Tong Station
2)搭skyliner同京成本線同樣都停日暮里及上野兩站, 大家是否同一條路軌,兩架不同列車而已呀? I guess yes but not sure because I took 京成本線 in a 1.5years ago they 好似 use the same platform. However, as 新手, I don't recommend you to take 京成本線. I have travelled to Japan more than 8 times, I took 京成本線 3 times, my comment is cheap but waste time (depends on the train is 快速、特急 etc, you need to allow about 2hrs just for train journey), have to bring your lugguages exchange line and some times too many people, you have to stand for an hr until somebody get off the train.
Besides, if you stay at 新宿/池袋, just simply take "Narita" because the total different between the fare for Skyliner and Narita is around $60~70 but relatively fast, no need/easy to exchange line and save time.
Sorry! 加把口: 銀座主力高檔名牌貨like Gucci, LV, Prada & Fg. Blue Label is 2nd~3rd level 名牌貨. I know that at least 高島屋、三越&伊勢丹 have Blue Label counter. In considering 貨品齊全, go to 新宿 because these 3 department stores are closed to each other especially 三越&伊勢丹!
It seems that you just want to have shopping at JP 睇你 shop 得幾仔細啦!. Since some products sold in big department stores are quite similar, 我行了2間就有點膩(可能去o左太多次的關係吧!). If it's your 1st time, the trip seems too short. By deducting the 1st and the last day travelling time. You only have 2 full day. All department stores are big and you will stop window by window for all interesting things found in the street. Also, you need time to 摸索街道/位置