[JEWELian]

most likely, the majority of the dates will be hall dates (hence the extended run of 2-3x shows than her usual tours), with arena stops probably limited to the major metro areas (fukuoka, osaka, nagoya and tokyo).

a lot of other artists run extensive hall tours year-round and theirs are usually locked in well in advance (kuu's 2017 tour which starts april 8 for example and all dates were announced beginning december 2016)

so it's probable they're having a hard time scheduling the halls if it was a late decision into this year's tour's planning.

otherwise, there might be a delay as the tickets will go on sale quite soon (1 month ish) before the actual shows if she starts with halls because they're likely to sell out faster due to the more limited than usual capacity. (and i think most likely she'll start with halls and move into arenas as a ~finale~ but could go either way i guess). so it's possible if dates are announced later this week the tour could still start in may.