* Opposition blames note ban for economic slowdown, job losses
* Analysts say 1.5 million jobs lost after demonetisation
* Govt says move led to higher tax, digitisation of economy
* About 10 billion rupees in old notes stuck in Nepal
NEW DELHI/MUMBAI, Nov 8 (Reuters) - Indian officials extolled last year's shock ban on high denomination bank notes as a success on Wednesday, while opponents staged protests and Nepal said its citizens were still stuck with billions of rupees in old money.
Prime Minister Narendra Modi withdrew 500 ($7.5) and 1,000 rupee ($15) notes from circulation on Nov. 8 last year in a bid to flush out cash hidden from the tax man and push the country toward digital transactions.
Modi got broad support for the move and his party scored a landslide win in a crucial election that followed. But an economic slowdown and job losses that resulted have given the opposition ammunition to attack his administration.
In recent days, government ministers have come out in full force calling demonetisation a success, celebrating the anniversary as anti-black money day.
Finance Minister Arun Jaitley said on Facebook that India's dependence on cash had fallen by nearly 3.89 trillion rupees. Cash to GDP ratio is now near 9 percent of gross domestic product, compared with nearly 12 percent before demonetisation.
About 5.6 million new taxpayers had been added to the tax net, the finance ministry said. And Reserve Bank of India data shows transaction volumes through mobile wallets, such as PayTM and MobiKwik, jumped after demonetisation to a high of 320.87 million in April, from 99.57 million in October.
But the move is widely blamed for contributing to a broad slowdown of the economy, which has hit its lowest level in three years. The Centre for Monitoring Indian Economy, a Mumbai based think tank, estimated that about 1.5 million jobs were lost in the first four months of 2017 due to demonetisation.
On Wednesday, the opposition Congress party held protests in major cities.
"It has ruined the lives of millions of hard-working Indians," Congress Vice President Rahul Gandhi said in a message on Twitter.
The pain from demonetisation is also being felt in neighbouring Nepal, where thousands of migrant workers still have old currency notes that they could not exchange before the window to do so closed.
Chinta Mani Shivakoti, deputy governor of Nepals central bank, Nepal Rastra Bank, said they were still waiting for Indian authorities' response to exchange nearly 55 million Indian currency notes held by its citizens. Business associations estimate the value of the notes at 10 billion rupees.
"This will gradually lead to the erosion of trust of the Nepali people in Indian rupees," Shivakoti told Reuters. "Indian silence over the exchange of old notes is an injustice to Nepali people."
An Indian finance ministry spokesman declined to comment. (Additinal reporting by Gopal Sharma in Kathmandu; Editing by Nick Macfie)