I had a casual phone call, they asked questions like why would you want to work there. They seemed to want loyal employees, I was at university at the time and was looking for a temporary job.

Very easy and standard retail interview. First step is a short 5 minute phone call just confirming your availability, right to work and location. Second stage is a group interview where you are all asked different situational questions. Make sure you use STAR method. A few questions might not need STAR, for example 'what do you like to do for fun?' They will 100% ask you what do you know/like about Uniqlo and why do you want to work there so be prepared for that. Group interviews might seem off putting but it honestly made the interview easier for me because I got to hear other peoples answers and then used that to better my own. Only three of us candidates were in the interview + two interviewers, so don't expect a massive group. 1st interview was on a Monday, 2nd was on Wednesday and then I got an offer on Friday, so they are very quick with the process.