When flying with Japan Airlines Business Class from Tokyo to Singapore, you can access the Sakura Lounge by JAL Airlines Group at Tokyo Haneda International Airport (HND). 

There are quite a few Sakura Lounges at the Tokyo Haneda Airport (HND), as this is one of the busiest airports in Tokyo. The one I visited was suggested by the airport's JAL staff, and it sure was one of the nice Sakura Lounges there. Below are the reviews and photos in detail:

Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
JAL Sakura Lounge at Tokyo Haneda International Airport
Table of Contents  [show/hide]

    Location 

    A few JAL Sakura Lounges exist at Tokyo Haneda International Airport (HND). However, when I asked the airport staff at the information booth which lounge was closer to my gate, she told me about the Sakura Lounge by Gate 114. Actually, you had to walk a bit further down to see the airport lounges sign and then take the escalator or elevator to the first floor to find the JAL Sakura Lounge. The lounge is right in front of the books and drugstore past the transit hotel.

    Access

    Like any other JAL Sakura Lounges, this Sakura Lounge at HND airport is accessible if you fly Japan Airlines in Business Class, hold any of the cards, such as Diamond, IG Premier, Sapphire, or have oneworld elite status. 

    Seats

    Sakura Lounge at Tokyo Haneda Airport is big. There are two sections of the lounge divided by the check-in reception area. So there are plenty of seats, but the lounge can get crowded. There are mostly dining tables and chairs, more than lounging chairs. 

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Lounge Seats

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Seats & Dining Tables & Chairs

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Lounge Seats


    Some seats also offer the runway spotting ANA and JAL planes by the window. 

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Lounge Window Seats

    Food

    The food served in the Sakura Lounge is not a buffet. You go up to make an order, and the lounge staff prepares the meal for you based on what you choose from the menu. Below is a picture of what they served when I was there. 

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    JAL Sakura Lounge Menu

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Food Ordering Station

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Chinese Bowl


    There's also a buffet station for sweets and bread:

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Pastries & Bread Buffet

    Drinks

    Both alcoholic and alcoholic beverages are available and self-serving. Beers, wines, liquors, juices, coffee, tea, water, you name it! 

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Self-Serving Liquors

    Bathroom & Shower Room

    The bathroom is nice and clean, and three shower rooms are individually available. 

    Massage Room

    A massage room inside the Sakura Lounge at Tokyo Haneda Airport also exists. Make sure you check it out because the massage chair is nice. It wasn't busy when I was there because most lounge guests could easily miss the massage room's location. 

    Review JAL Sakura Lounge at Tokyo Haneda Airport (HND) For Japan Airlines Business Class Tokyo (HND) To Singapore (SIN)
    Massage Chair Room

    Wi-Fi

    Wi-Fi is available, and you can simply connect to JAL without a passcode, and you just need to agree to the terms and conditions. 

    Conclusion

    A few JAL Sakura Lounges exist at Tokyo Haneda International Airport (HND). The Sakura Lounge I visited was the one by Gate 114 because it was close to my departure flight from Tokyo to Singapore. 

    The Sakura Lounge was nice and large, with several seats available for dining and lounging, including planes spotting at the window seats. The lounge offers sweets and bread in a buffet style and food off a small menu. Liquors and drinks are unlimited and self-serving inside the lounge.