kono syasin wo miru tabi ni, kazoku to issyo ni hanami wo sita hi wo omoidasimasu.

たびに means whenever or every time.

So:

• この写真を見るたびに = every time I look at this photo

It expresses something that happens repeatedly whenever the action before it happens.

A common pattern is:

• Verb dictionary form + たびに
  
  • 行くたびに = every time I go
  • 会うたびに = every time I meet

With たびに, Japanese normally uses the dictionary form of the verb:

• 見るたびに
• 行くたびに
• 読むたびに

Even if the sentence talks about something that has happened many times in the past, the form before たびに usually stays in the dictionary form because it means whenever one does X as a repeated condition.

So この写真を見るたびに means:

• whenever I look at this photo not
• after I looked at this photo

Because there are really two different verbs/clause units here, and each one has its own object.

1. この写真を 見る

   • 写真 is the object of 見る

2. 花見を した

   • 花見 is the object of する

3. 日を 思い出します

   • 日 is the object of 思い出します

So the sentence contains a smaller clause inside a bigger sentence:

• 家族と一緒に花見をした日 = the day when I did hanami with my family

Then that whole noun phrase becomes the object of 思い出します:

• その日を思い出します = I remember that day

• 家族と means with my family
• 一緒に means together

So 家族と一緒に means together with my family.

The particle と marks the companion:

• 友達と行く = go with a friend

一緒に adds the idea of doing it together:

• 友達と一緒に行く = go together with a friend

In many cases, 家族と花見をした would already be understandable, but 一緒に makes it sound a little more natural and explicit.

花見 literally means flower viewing, but in modern Japanese it usually refers specifically to cherry-blossom viewing.

It is a noun that is often used with する:

• 花見をする = to go cherry-blossom viewing / to do hanami

So:

• 花見をした = did hanami / went cherry-blossom viewing

This is a very common pattern in Japanese:

• 勉強をする = study
• 散歩をする = take a walk
• 花見をする = go flower viewing

This is a relative clause.

In Japanese, the clause that describes a noun comes before the noun.

So:

• 家族と一緒に花見をした = (I) went flower viewing with my family
• 日 = day

Put together:

• 家族と一緒に花見をした日 = the day when I went flower viewing with my family

English often uses words like that, when, or on which. Japanese usually does not. It simply places the describing clause directly before the noun.

Because Japanese often leaves out the subject when it is clear from context.

In this sentence, 思い出します strongly suggests the speaker is the one remembering, so I is understood automatically.

A fully explicit version could be:

• 私は、この写真を見るたびに、家族と一緒に花見をした日を思い出します。

But in natural Japanese, that 私は is often unnecessary.

Japanese often omits possessives like my, your, and his/her when they are obvious from context.

So 家族 by itself often means:

• my family when I am talking about my own experience
• someone else’s family if the context makes that clear

Here, since the speaker is recalling a personal memory, 家族 is naturally understood as my family.

Because the sentence is not saying when the hanami happened. That part is already shown by した.

The main verb 思い出します describes what happens now / habitually:

• Every time I look at this photo, I remember...

So the tense works like this:

• 花見をした日 = the day I did hanami with my family → past event
• 思い出します = I remember / recall it → present habitual action

This is very natural in both Japanese and English.

This is an important nuance.

• 思い出す = to recall, have a memory come back, be reminded of
• 覚えている = to remember/know and still retain in memory

In this sentence, seeing the photo triggers the memory, so 思い出します is the best choice.

Compare:

• この写真を見るたびに、あの日を思い出します。
  = Every time I see this photo, that day comes back to me.

• 彼の名前を覚えています。
  = I remember his name.

So 思い出す is about a memory surfacing, while 覚えている is more about something being stored in memory.

Japanese nouns usually do not mark singular vs. plural clearly.

So 日 literally just means day, and context tells you whether it is:

• a specific day
• a day in general
• multiple days

Here, it most naturally means one specific memorable day:

• the day when I went flower viewing with my family

If the speaker wanted to clearly emphasize multiple occasions, they would probably phrase it differently.

No. Standard Japanese is normally written without spaces between words.

So the natural written sentence is:

この写真を見るたびに、家族と一緒に花見をした日を思い出します。

The spaced version is usually just for learners, to make the word boundaries easier to see.

Sometimes yes, but たびに is the standard form learners should remember first.

For example:

• この写真を見るたびに、思い出します。
• この写真を見るたび、思い出します。

Both can be seen, but たびに is clearer and more textbook-standard. If you are unsure, use たびに.