I'd like to do a memorial service without a Buddhist altar

Write the following on a piece of paper.
① Date of death
② Common names (or commandments)
As far as you can understand, write each person on a separate sheet of paper as much as possible.
I don't know what are my distant ancestors
The spirits of the ancestors of the ○○ family
The spirits of the ancestors of the ○○ family
and write one sheet at a time
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Hot tea is brewed every morning, and what has been poured into a bowl is offered in front of a sheet of paper.
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Read the sutras aloud the date of death and the common name (or commandment name) of each person.
Now we can make a proper memorial service.
A memorial service means helping, so it's about having a clear sense of saving those who have died.

It is wonderful that you always remember the heart of the memorial service.

There must have been various circumstances and serious things. You've been able to do your best.

Since your father was there, it is precious to put your feelings for you or an important person who exists in this world, and don't forget it, and make a memorial service.

Of course, there are interpretations of Buddhist altars depending on the denomination, but they are branch offices of temples.

There will be a Buddha or someone you have a connection with who will come.
It's fine on the chest of drawers. Clean it up.
If you know your name, it will be written for you; if you don't know, write it down from generation to generation, then pray for it.
Please offer them offerings, incense sticks, and water.

There is no need for a shape at all for memorial services.

If you value the shape, the feeling in your heart will be neglected.

The shape is not necessary. The most important thing is how you feel in your heart.

For reference, I'm talking about Uchio-ji Temple, but there are people with various circumstances. There are also many people who don't make Buddhist altars at home, and there are also people who can't.
The cards have been made and kept at the temple. Moon prayers, Obon, Ohigan, and the anniversary of death are held in the main hall of the temple.
The cards also vary depending on the item, but they can be purchased starting at a few thousand yen, and when there is a little room to spare, maybe it's okay to prepare one.

That's because the most important thing is how you feel in your heart.

I'm sure your father is watching over you too.

Also, please come and ask the Osho guys about the details here.

The most important thing is that it's not a Buddhist altar. Even if you don't have a Buddhist altar, your heart will be a memorial service. When you visit a temple, it's a good idea to give them incense sticks and put your hands together.
When I think about it every day, that feeling of putting hands together is more important than anything else.

Since it's Buddhism, Buddha's pictures or words
I think it would be nice to have one (which of Nanmu Amitabha Buddha Nanmu Myōhō Renge Kyō Nanmu Daishi Hensho Kongo is a representative place), etc.
You can write it yourself, or I think it's OK to buy it somewhere.

In extreme terms, it might be a good idea to take a picture of the Buddhist altar that exists now, print it out, hang it on the wall, and invite it to the computer or smartphone screen only when you want to worship it.

Also, since it's called the Western Pure Land of Paradise, I think it's a good idea to worship in the direction the sun sets (west) and remember your ancestors when you actually see the sunset.