By the time the Ueshiba was born the Samurai era had already been over for 20 years. Takeda is the one who really crossed over.
If you take a look at "Aiki Budo is the Way of Human Development
" you'll see that Ueshiba was hardly the originator of the concept of Budo as social and personal reform.
The word "dojo" does have its roots in Buddhism, but not specifically Jodo Shinshu.
FWIW, Ueshiba was educated in a Shingon
temple, which is quite different from Jodo Shinshu. He continued to use Shingon terminology and concepts when he spoke, even into his later years.
I'm not sure what your point is with Kamidana, but it's very common in Japanese households to have both Buddhist and Shinto accoutrements.
Dissecting the Founder's enlightenment is very tricky, even in Japanese, and technical instruction is woven throughout everything. I think that it's very difficult to try and dissect it based upon the current uncertain translations, and without a background in the context of what he was speaking about.
Thanks for that reply. What the founder did and what Modern Aikido did are different in regards to the "spiritual". Please try to keep the topic to Modern Aikido. If you wish to discuss Morihei Ueshiba and his skills/abilities/spirituality, you can create a thread in the Non-Aikido Forum where it belongs.