The hotel provides a free shuttle from the NRT airport so you just need to get yourself to the airport from Asakusa, the cheapest way - train or bus, to catch the free shuttle buses. Or if you miss the last shuttle bus that leaves at 11:05pm you will just need to take a short cab ride. The shuttle runs every hour and starts at 7:35am, 8:10am, 8:45am, 9:25am, and then hourly from 10:40am and then becomes half hourly at 4:10pm, 4:40pm , 5:10pm and 5:40pm and switches to 6:05pm, 6:35pm, 7:05pm, 7:35pm with the last bus at 11:05pm. This schedule was from my last trip back in January 2019 and is for the bus stop at the international terminal, so if you are coming from the other terminal, it could leave a few minutes earlier/later as I cannot recall if we were picked up first or the other terminal. Happy travels!

ルームサービスはあります。部屋によってかもしれませんがルームサービスのメニューが置いてある部屋がありました。

間違ってはいません。 成田ビューホテルのスタッフ達は親切丁寧に対応しています。

Yes. It is one of the closest hotels. Depending on your terminal it is a 5-10 minute ride. They also have a free hotel shuttle every 30 minutes.