Spending a few hours at karaoke is a must-have experience in Japan. Any city will have multitudes of chains to choose from, each with different pros and potentially cons depending on your needs.
I personally love the Karaoke no Tetsujin (Karatetsu) location near Sakuragicho Station in Yokohama because of the wide range of English songs and affordability (it only costs around 100 yen for 30 minutes per person on weekdays from morning until 6PM). I also sometimes visit the Manekineko chain near Ofuna Station, which offers quite affordable all-night prices for when I really want to go all out. I also like that Manekineko allows you to bring your own food and drinks so that you don’t have to order from the (oftentimes overpriced) karaoke menu.
At Cote D’Azur, prices tend to be a little higher, but rooms are usually more spacious and well-kept. You even have the option to choose themed rooms featuring little stages for dancing, toys for small kids, darker color schemes with roses for a more romantic feel, and more.
The reservation process and varying prices depending on the time and day can make going to karaoke for the first time a little confusing and intimidating. I would recommend going with someone who has done it before so they can guide you along and fully immerse you in this quintessential Japanese experience (considered one of the country’s national pastimes)!
Learn more about karaoke: https://tokyocheapo.com/entertainment/karaoke-japan-guide/