It can get pretty ugly, though. The statement I posted assumes the merchant is being nice, and the samurai is being civilized. With a powerful patron, the following adventure nugget below can happen:
“Bitter World of the Samurai” Adapted from a story from ‘Samurai Executioner’
From an inscription drawn in blood on a wall in a merchants house:
“This is the Bitter World of the Samurai. The arrogance and extravagance of the merchant class is intolerable. They make a living through unproductive thievery. Moreover, ignorant of their proper place, they exploit their samurai superiors. That is truly unspeakable.
“The Suffering of the Samurai has but one root: The hideous union between government and commerce.
“First, the posted price of rice is unreasonably low so that merchants can make vast profits. This is truly proof of the collusion between the government and the merchants.
“Second, what is with this ‘seal money’? As if the unprecedented 15% the rice merchants squeeze out of us wasn’t enough, they use seal money as and excuse to get even more out of us. Such evil is intolerable.
“Third, they rip the Farmers off with ‘surcharge rice’.
“We shall rectify the shady dealings of officials and merchants with the white blades of warriors.
“Alas, This is The Bitter World of the Samurai.”
Some context to the above:
The government (Clan or Imperial) paid Gokenin (lower ranked retainers such as Gi-Samurai ,etc.) in unpolished rice. The ‘Posted Price’ determined the exchange rate for turning rice into cash and vis versa. The Accounting Office (Office of the Imperial Graineries or Clan offices charged with the same duties) examined the prices for the three classes of rice : High for the Kuge , Medium for the Buke , And Low for the Gi-Samurai and bulk of the merchant caste) and used the average between the three to determine the value of 100 bags of rice.
The Prices would be displayed on gates of castles and within merchant sections of cities. But the prices would drive Hatamoto (middle ranked samurai) and Gokenin into poverty.
Merchants would keep an eye on when prices were posted, typically the Second Month of Spring, the Fifth Month of Summer, and the Tenth Month of Winter – rice merchants would cause the prices to decline. When the market fell, typically when stocks were plentiful, the merchants would sell rice cheaply. Later, when stocks were low and demand was high, they would raise prices to maximize profits. Also, Large government donations to the merchants in the form of rice stocks or additional monies allowed the posted prices to be 20%-30% less than actual market value.
This forced the Hatamoto and Gokenin had to borrow huge sums of money from the rice merchants at a fixed interest rate of 15%. For additional insult to injury, rice merchants would exploit them further by using ‘seal money’ as pretext to raise the interest rate. Rice merchants would borrow their own money from others. When they received rice, they would use seal money as poof of payment. A bit like a deceptive sublessor, really. They would demand this ‘seal money’ on every transaction. While the interest rate was fixed at 15%, the seal money added another 20% Fee. Every three months. So Call it 80% at years end. A 100 Ryo loan becomes 195 ryo to pay back over a year. And the Government would do nothing about it.
Now you know why samurai really didn’t like merchants.
Note: The above shenanigans is really not that far off from what happened historically. Reprisals against the merchant class were more common is spoken off and tales of arrogant merchants were pretty common in Japanese folklore. This should spur ideas for aspiring GM’s want to handle some economic themes.