Yakuza: Dead Souls: Akiyama's 15 substories
Akiyama's part has 15 substories, and several are connected. If you're looking for a later job in a chain, you need the earlier one finished first. The same thing applies to the partner stories: recruiting somebody is the beginning of their chain, not the end.
Spoilers below for all of Akiyama's side stories.
Most of these become available in his Chapters 3 and 4. They aren't permanently lost when you move on, but I'd clear the ones available before advancing so you aren't fighting the changing quarantine layout later. Enter alone unless the entry specifically asks for a partner. An unrelated companion can stop an event from appearing.
1. Big Daddy Part 1, Chapter 3
Talk to Kazumi near the barrier outside Mach Bowl. She's looking for Kendo. Enter the quarantine alone, find him in the Theater District, agree to help, and escort him out alive. This recruits Guy Kendo as a partner.
2. Big Daddy Part 2, Chapter 3
Find Kendo at Gary's Boot Camp and agree to take him out for practice. Clear the encounter, then speak to him near the southern end of Nakamichi Street, north of Don Quixote. The next stop is Shichifuku Parking Lot. You can agree to continue straight into Part 3 or leave it for later.
3. Big Daddy Part 3, Chapter 3
If you stopped after Part 2, speak to Nomura by the Millennium Tower quarantine elevator. Go into the Theater District to find Kendo, continue to Mitani, and clear the zombies. This finishes the chain and awards an Eye of the Dragon.
4. Yakker FTW!, Chapter 3
Speak to the excited man outside the batting center and accept the contact information for the woman asking for help. Go into the quarantine and follow the encounters in order: the south end of the Sky Finance street, the Gelateria area, the northwest Theater District, and the underground entrance. Descend the escalator, speak to Shimizu, agree to search, and keep moving through the underground route. Finish the fight at the end. The early answer about whether you know Yakker isn't the important choice; accepting the search is.
5. Clichés, Chapter 3
Find Kondo by the tanker in the Theater District. Accept his invitation, speak to everyone inside, and talk to him again. Fight through the ambush, go into the adjoining room with the hole in the floor, and finish the successive groups. Clear this before looking for A Doctor in Danger.
6. Foiling a Fraud, Chapter 4
Finish Yakker FTW! first, then talk to Ishikura at Poppo on Nakamichi Street and agree to guide him. Meet him at the Millennium Tower elevator and escort him toward the southern end of Tenkaichi Street. You'll have a chase involving Wataru, followed by a fight. Use the chase controls to tackle your target and deal with obstacles rather than trying to play it like ordinary free-roam combat. The reward includes An Assassin's Anguish, the design source for Bloody Binding.
7. Lifesavers Part 1, Chapter 4
Speak to the Elise recruiter near Millennium Tower and Matsuya, then visit Elise. Agree to look for Marina, go into the quarantine, and follow the event near Matsuya. Clear the zombies and escort her safely out. Marina joins your partner roster.
8. Lifesavers Part 2, Chapter 4
Bring Marina to level 2 through combat or training, then enter the quarantine with her. Approach the supply box in the initial underground room to trigger the next event. Head back toward the Matsuya/Gelateria area where you found her. Let Marina handle the enemies in this encounter. Help her recover and knock enemies off her if necessary rather than doing all the killing yourself.
Helpful Links:
Akiyama's substory walkthrough: https://gamefaqs.gamespot.com/ps3/998171-yakuza-dead-souls/faqs/79387/akiyamas-substories
Full substory checklist: https://www.playstationtrophies.org/forum/topic/140091-substory-guide-and-checklist/
9. Lifesavers Part 3, Chapter 4
Continue from Part 2 toward the underground shopping area. Go down when the event directs you there and clear the fight. The chain ends with a Bull's Eye Amulet, which is useful for the headshot side of your combat setup.
10. A Doctor in Danger, Chapter 4
Finish Clichés first. Find Doctor Emoto near the barrier by Matsuya on Tenkaichi Street and agree to help his patient. Follow the route to the Theater Underground, speak to him near the escalators, and descend to B3 to find Tsujimura. Defeat the enemies there to finish the rescue.
11. Collection Time: Back to Work, Chapter 4
Talk to the man outside Smile Burger, then return to Sky Finance through the quarantine. Clear the zombies inside and inspect Hana's desk near the exit to get the Client Register. Open it under Items, then Valuables. That register is the link to the four collection jobs below.
12. Collection Time: Hanaoka, Chapter 4
After checking the register, find Hanaoka in the Hotel District, on the northern street east of the batting center. Ask to collect. Follow the subsequent calls to Kamurocho Hills and Children's Park, then speak to the suited man by the barrier near Mach Bowl. Enter the quarantine and find Alicia beside the billboard in the Theater District. Once that part is resolved, return to Hanaoka. The final return is easy to overlook if you assume finding Alicia finished the entire job.
13. Collection Time: Juri, Chapter 4
Check the register, then speak to Juri by the Millennium Tower quarantine barrier. Ask to collect and agree to enter the quarantine. Go to the Theater District, clear the encounter, and return to her. The concluding explanation does not change whether the story is finished. The rewards include a Seal of the Dragon.
14. Collection Time: Kazami, Chapter 4
After consulting the register, go to Suppon Street inside the quarantine. Agree to proceed, enter the damaged building beside the event, and come back out. Deal with the zombie that appears to finish the job.
15. Collection Time: Tsukimura, Chapter 4
Finish the Hanaoka, Juri, and Kazami collections first, then check the register's fourth page and find Tsukimura by Ebisu Pawn. Start the collection, clear the enemies, and go through the broken wall into the alley behind Sky Finance. Find him there, agree to help, and escort him out alive. He won't appear for this last collection while the other three are unfinished.
If something seems to have disappeared, check Missions → Substories for the last recorded step. Then check the character, quarantine state, and partner you're using before assuming it's missed. In Premium Adventure, Asagi can restore the appropriate infected city state.
Finishing all 15 gives you the design source From Yakuza to Avenger, which unlocks the Elise upgrade for Akiyama's twin handguns. Pick the reward up at Naomi's Palace when the notification arrives. The substories are also one quarter of the requirement for the later Amon fight.
Yakuza: Dead Souls: Akiyama's 15 substories
· Games/Yakuza: Dead Souls