Question: Does Jiro's son's age have anything to do with his employment?
About the article "Jiro Dreams of Sushi", section "Production".

Candidate passages:
  Jiro: the protagonist who apprentices himself at the Hanaza; he is a clumsy 13-year-old.
Hanji: Jiro's father, a craftsman who makes puppets for a living; he is utmost serene.
Isako: Jiro's grouchy mother; she blames Jiro for the deaths of his two brothers and sister.
Yoshida: the puppet master of the Hanaza; he has a nasty attitude, and beats Kinshi with a bamboo stick.
Kinshi: Yoshida's son who tutors Jiro in the way of the puppet.
"Saburo": a bandit who robs rice and money from the rich to feed the poor.
Okada: the blind, wise reciter at the theater; he plays a part as Saburo.
Taro: Jiro's neighbor's son, Jiro finds Taro at Jiro's house when his parents are gone.
Mochida: young boy who works at the theater; chief left-handed operator; oversees the chores and practices of the other boys  
Deepak (Bharat Bhushan) lives as a tenant in a small room, owned by his landlord Om Prakash Munshi(Om Prakash).
Although he is a poet, he is unable to secure any employment.
One day he meets with Jyoti (Vyjayanthimala) and both fall in love.
After their marriage, there is considerable resentment, and Jyoti's brother, Shekar (Ashok Kumar) refuses to have to do anything with Jyoti.
When Shekar offers money to Deepak, Deepak refuses to accept it.
Shekar and Jyoti's dad, Daya Shankar (Badri Prasad) sympathises with Jyoti and wants her to be the sole heir to his property after his death.
In the meantime, Om Prakash marries his son to a wealthy woman, who does bring in a lot of dowry, but refuses to do any household work, and instead puts her father-in-law to work.
As Deepak is unable to get employment, Jyoti is successful in getting employment as a singer on the local radio station, not knowing that Deepak is resentful of her success, and is thinking of separating from her. 
In early 1918, a young boy living in a provincial town, Jiro Horikoshi, has a dream about climbing up onto his roof and flying away in a bird-like airplane, while wearing aviator goggles.
After a while, a large, monstrous ship emerges from the clouds, and drops some anthropomorphic bombs on him.
His plane is destroyed, and he plummets to the ground, then wakes up.
Borrowing an English-language aviation magazine, he diligently studies it with an English dictionary, then has another dream where he meets Italian plane designer Caproni, who is surprised that a Japanese boy has intruded in what he thought was his own dream, then realizes that airplanes are a shared dream they both have.
Caproni tells Jiro that he can't fly a plane with glasses, but that building planes is better than flying them.
Jiro wakes up and decides he will build planes.
Five years later, Jiro is at university to study engineering.
On traveling back to Tokyo from a holiday, he meets a young girl named Naoko, who is traveling with her maid.
At this time, the Great Kanto Earthquake of 1923 hits, which stops the train and causes Naoko's maid to break her leg.
Jiro delivers Naoko and her maid to Naoko's family, then walks away without giving his name.
He arrives at his university and fights to save engineering books as Caproni's voice cheers him on.
Jiro begins working at an airplane manufacturer, assigned to a fighter design team.
Their project ends in failure, with the company losing the design contract to a rival company.
With no immediate projects to take on, he is sent to Germany to do technical research and to obtain a production license for a Junkers aircraft.
He argues with German soldiers and witnesses a night raid by German secret police.
During the journey, he again dreams of Caproni, who asks him, "Do you prefer a world with pyramids, or with no pyramids?"
implying that airplanes, like pyramids, are a thing of beauty and wonder.
Even if mankind might inevitably twist them to ugly purposes, Caproni believes that the world is better for having that beauty.
In 1932, he is promoted to chief designer for a fighter plane competition sponsored by the Navy, which ends in a failure.
Disappointed, Jiro visits a summer resort where he runs into Naoko again; they are engaged soon after.
A German man privately critical of Adolf Hitler assists the romance before fleeing a feared arrest by Japanese authorities.
Naoko is afflicted with tuberculosis, and refuses to marry until she recovers.
After some months, Jiro is assigned again as chief designer for another Navy competition, living at his supervisor's home to evade unwanted police attention.
At the same time, Naoko is recuperating in an alpine sanatorium obliquely related to the locale of "The Magic Mountain", but she cannot bear being apart from Jiro and resolves to return and marry him.
Jiro's hosts perform an impromptu traditional wedding.
Jiro's sister complains that his marriage to Naoko will end badly, as, having become a doctor, she is well aware of the incurable nature of tuberculosis.
Jiro counters with the argument that every day is precious to Naoko and that what he does, he does for her.
Even though Naoko's health continues to deteriorate, she and Jiro enjoy their life together, the one lending strength to the other, right up to the day of the test flight of the prototype of what would become his first successful aircraft, the Mitsubishi A5M.
On that day, after Jiro leaves for the factory, Naoko informs the company housing manager's wife that she feels strong enough to take a walk.
Her departure is witnessed by Jiro's sister, who fears that this represents a desire on Naoko's part to spare Jiro the horror of her final dissolution in the coils of the disease – a fear which is borne out in three letters which Naoko leaves for her husband, family, and friends.
At the test site, Jiro is interrupted by a burst of wind – seemingly implying that his wife has died.
The film ends in a dream sequence with Jiro emerging from the horror of war, feeling regret for his inventions and the deaths they caused.
Caproni tells him his dreams were nonetheless realized.
Naoko appears in this dream one last time, exhorting her husband to live on in the trust she has in him. 
 Etsuko – main protagonist; middle-aged Japanese woman Keiko – Etsuko's elder daughter who commits suicide Niki – Etsuko's second daughter, by her English husband Sachiko – woman known to Etsuko, and, possibly, a third person on whom Etsuko projects bad memories, thoughts, and events Mariko – Sachiko's daughter, and, possibly, a representation of Etsuko's daughter, Keiko Jiro – Etsuko's first husband Ogata-san – Jiro's father Frank – man that Sachiko was going to America with Mrs. Fujiwara – the owner of noodle shop who gave Sachiko a job Hanada – Jiro's friend who threatened his wife with a golf club Shigeo Matsuda – a student in Ogata-san's class  
These 4 OVAs directly follow the conclusion of the 13 episode TV series.
Jiro has now met new people and battling to save a boy that is professor Gill's son.
Gill is now attacking a boy (named Akira) because he is the key of Gill's new project,the Armageddon Lord.
During Jiro's new journey he met his two new brothers named Ichiro (Kikaider 01) and Rei (Kikaider 00) but unlike Jiro they do not have conscience circuits.
In the end Gill successfully captures Akira,uses the Armageddon Lord to devastate the city from the previous series, and puts a Submission chip inside Jiro,but instead of becoming a slave to Gill it conflicts with his GEMINI circuit and gives him the ability to lie and destroy his brothers who also had Submission chips.
Jiro manages to kill Gill just as the Armageddon Lord's generator blows up,goes unstable,and is destroyed leaving only Jiro and Gill's body the only thing left.
Jiro leaves Akira in the hands of a monk scientist that raised Ichiro and reactivated Rei.
Afterwards,Jiro then proclaims that having now committed such horrible acts that he is now human and that his heart will forever be in "eternal conflict" as he walks alone into the sunset.