The cost of soya bean has doubled on the world market in recent months, making imports of the commodity increasingly expensive.
The main cause of the price rise in Indonesia is shifting production in the US.
A US energy bill signed into law last September, encouraged a massive increase in the production of biofuels like ethanol.
Soya bean and corn, once used mostly for food, are now being converted into fuel.
That means soaring prices for Indonesia's "food of the poor".
Take the case of Tukino. His family has been running a home factory for the last 34 years, making bean curd, one of Indonesia's most popular dishes.
Bean curd is a staple of Indonesian diet
But never before has soya bean been so expensive.
The price has doubled during the past few weeks.
Analysts say this is because US farmers are replacing the crop in order to grow corn for biofuel instead.
Tukino says: "We are really suffering from this. We are sweating here everyday just to make ends meet.
"I am trying to run a business but if this situation continues a lot of people have to be laid off."
Bean-curd factories like the one run by Tukino's family went on strike for three days to protest against the price increase.
But after consumers began to complain, they decided to operate again.
Nutritious and cheap
Bean curd has kept many poor Indonesians healthy for a very long time.
It is very nutritious and it used to be very cheap, but now Indonesia's favourite food is becoming very expensive and hard to get. And this is already creating unrest.
To calm down sentiments, bean curd and tempeh, another popular soya bean dish, are being sold again on the market, much to the relief of many Indonesians.
But while the price is still the same, the sellers have made the portions much smaller.
One resident of Jakarta
said: "My children don't want to eat anything when there is no tempeh
or bean curd. They simply don't feel well if I don't serve it to them.
"Normally I could buy it at a food stall, but there hasn't been enough in the market for quite a while."
Indonesian Farmers Union says the country should become self-sufficient
again and start growing soya bean as it used to do in the past.
Henry Saragih, from the Indonesian Farmers Union, says: "This is a basic need which is now very hard to get.
"This is not only turning in to a social crisis, but this could also cause hunger and malnutrition."
The government admits that it should have worked harder to achieve self-sufficiency.
Alimoeso, an agriculture ministry official in charge of food crops,
told Al Jazeera: "This is an international problem, we cannot stop free
we should indeed have protected our farmers more. There is not a single
country that doesn't protect its own farmers. We should have been
the time being the Indonesian government has decided to control the
price of soya bean by asking the state food company to buy stock
This could prevent a deepening food crisis in the country for now.
Still, in the long term, other measures may have to be found.