Japan is a good place to cook Vietnamese food: thinly sliced beef for pho, rice paper and bean sprouts are in every supermarket. Only some herbs need a swap.
Large supermarkets sell rice paper (ライスペーパー), rice vermicelli (ビーフン), fish sauce and fresh herbs. KALDI and Gyomu Super have pho noodles and star anise. Vietnamese grocery shops and online shops have the rest.
Rice paper (ライスペーパー)
Ethnic shelf at most supermarkets
Pho noodles (フォー)
KALDI, Gyomu Super, some supermarkets
If not: Rice vermicelli (ビーフン)
Fish sauce (nước mắm)
Ethnic shelf as ナンプラー or ヌクマム
Thinly sliced beef
Every supermarket: しゃぶしゃぶ用 beef is perfect for pho
Star anise (八角 / スターアニス) and cinnamon
Spice aisle
Mint (ミント) and coriander (パクチー)
Herb section at most supermarkets
Thai basil
Rarely sold
If not: Regular basil
Vietnamese perilla (tía tô)
Rarely sold
If not: Red shiso (赤じそ) in summer, or green shiso (大葉)
Bean sprouts (もやし)
Every supermarket, very cheap
Limes
Large supermarkets
If not: Lemon
Lazy Recipe sees that you're in Japan, picks swaps from Japanese supermarkets, and your shopping list shows each item's Japanese label and aisle. Type a dish or snap a photo.