Unfortunately from today, the shuttle bus from Taisho to Ikea will be cancelled. I can only imagine that it is due to cost cutting or problems with parking permissions, as there were definitely enough people using the service. I’ve been Ikea a few times and bought way too much stuff and always took the shuttle bus from Taisho (Sangenya) so it is sad news for me. You can still get the 108A or 72A city bus to Tsuruhama though. Unfortunately those buses take a long time because they make a lot of stops.
The shuttle bus from Namba is still operating. More details here: