This is for the ohanami trip.

Schedule

3/25-30: Tokyo (started blooming 3/21)

3/30-31: Fukuoka (start blooming 3/22)

3/31-4/2: Shikoku (start blooming 3/25)

4/2-4/4: Kyoto/Nara (start blooming 3/30)

4/4-4/5: Gifu? TBD -> Tokyo

4/6: Home

Tokyo

3/30: Leave early in AM; go to Fukuoka-shi for our first ohanami at Maitsuru Koen; take a shinkansen back to Kitakyusyuu to check in; Yozakura at castle (~21:00); get food and maybe onsen
3/31: walk around Mojiko if we have time; TOTO Museum (opens at 10AM); head out (see below)
To stay: TBD
To do:

picnic at Ogura Castle in Kitakyusyu

visit Mojiko "retro": maybe skip if we want to go somewhere else on 3/31 like Itsukushima.

visit Maitsuru koen: note this is in Fukuoka-shi while the others above are in Kitakyuusyuu

3/31 afternoon: take a train to Hiroshima; eat okonomiyaki; take a train to Mitoyo-shi; Yozakura at Asahi Sanrin Koen
4/1: Hike up Shiudeyama; picnic; take a train to Kotohira; onsen
4/2: Hike up Kotohira shrine; picnic; head out (see below)
To stay: TBD (weekend, so book early)
Mitoyo-shi in Kagawa for Shiudeyama: best spot in Shikuko, it seems.
Near Mityo-shi in Kagawa for Kotohiragu: famous shrine for having many stairs. Also, good onsen
Mitoyo-shi in Kagawa for Asahi Sanrin Park
Takamatsu-shi in Kagawa for Ritsurin Park: we've been there. More udon time?

4/2 afternoon: udon stop in Takamatsu; head to Osaka; Yozakura at the castle or the park
4/3: Go to Nara; hike up Yoshinoyama; come back to Osaka for yozakura
4/4: Stop in Kyoto for Maruyama koen; head out (see below)

Hasedera? 1000 sakura trees.

4/4 afternoon: go to Kofu-shi or somewhere around there to check in; take a train and hike up to the old tree; come back for onsen
4/5: head back to Tokyo; maybe in stop in Saitama for more trees?
Those two trees are regarded as one of the oldest and best sakura trees in Japan:
Neodani Usuzumi Sakura: in Gifu.
Yamataka-Jindai Sakura: in Yamanashi; a bit out of the way but doable.　Lots of onsen in a nearby town.